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feat(tools)!: substantial clean up of "Tool" related datatypes (#3627)
This is a sweeping change to clean up some gunk around our "Tool" definitions. First, we had two types `Tool` and `ToolDef`. The first of these was a "Resource" type for the registry but we had stopped registering tools inside the Registry long back (and only registered ToolGroups.) The latter was for specifying tools for the Agents API. This PR removes the former and adds an optional `toolgroup_id` field to the latter. Secondly, as pointed out by @bbrowning in https://github.com/llamastack/llama-stack/pull/3003#issuecomment-3245270132, we were doing a lossy conversion from a full JSON schema from the MCP tool specification into our ToolDefinition to send it to the model. There is no necessity to do this -- we ourselves aren't doing any execution at all but merely passing it to the chat completions API which supports this. By doing this (and by doing it poorly), we encountered limitations like not supporting array items, or not resolving $refs, etc. To fix this, we replaced the `parameters` field by `{ input_schema, output_schema }` which can be full blown JSON schemas. Finally, there were some types in our llama-related chat format conversion which needed some cleanup. We are taking this opportunity to clean those up. This PR is a substantial breaking change to the API. However, given our window for introducing breaking changes, this suits us just fine. I will be landing a concurrent `llama-stack-client` change as well since API shapes are changing.
This commit is contained in:
Ashwin Bharambe
GitHub
parent
1f5003d50e
commit
ef0736527d
179 changed files with 34186 additions and 9171 deletions
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docs/static/stainless-llama-stack-spec.html
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docs/static/stainless-llama-stack-spec.html
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@ -2404,11 +2404,11 @@
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"get": {
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"responses": {
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"200": {
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"description": "A ListToolsResponse.",
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"description": "A ListToolDefsResponse.",
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"content": {
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"application/json": {
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"schema": {
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"$ref": "#/components/schemas/ListToolsResponse"
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"$ref": "#/components/schemas/ListToolDefsResponse"
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}
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}
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}
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@ -2449,11 +2449,11 @@
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"get": {
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"responses": {
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"200": {
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"description": "A Tool.",
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"description": "A ToolDef.",
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"content": {
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"application/json": {
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"schema": {
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"$ref": "#/components/schemas/Tool"
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"$ref": "#/components/schemas/ToolDef"
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}
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}
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}
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@ -10499,79 +10499,6 @@
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]
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},
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"arguments": {
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"oneOf": [
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{
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"type": "string"
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},
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{
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"type": "object",
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"additionalProperties": {
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"oneOf": [
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{
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"type": "string"
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},
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{
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"type": "integer"
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},
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{
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"type": "number"
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},
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{
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"type": "boolean"
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},
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{
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"type": "null"
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},
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{
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"type": "array",
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"items": {
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"oneOf": [
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{
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"type": "string"
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},
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{
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"type": "integer"
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{
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"type": "number"
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},
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{
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"type": "boolean"
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},
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{
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"type": "null"
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}
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]
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}
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},
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{
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"type": "object",
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"additionalProperties": {
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"oneOf": [
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{
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"type": "string"
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},
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{
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"type": "integer"
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},
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{
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"type": "number"
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},
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{
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"type": "boolean"
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},
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{
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"type": "null"
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}
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]
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}
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}
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]
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}
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}
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]
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},
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"arguments_json": {
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"type": "string"
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}
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},
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@ -12165,6 +12092,10 @@
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"ToolDef": {
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"type": "object",
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"properties": {
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"toolgroup_id": {
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"type": "string",
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"description": "(Optional) ID of the tool group this tool belongs to"
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},
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"name": {
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"type": "string",
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"description": "Name of the tool"
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@ -12173,12 +12104,57 @@
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"type": "string",
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"description": "(Optional) Human-readable description of what the tool does"
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},
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"parameters": {
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"type": "array",
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"items": {
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"$ref": "#/components/schemas/ToolParameter"
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"input_schema": {
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"type": "object",
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"additionalProperties": {
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"oneOf": [
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{
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"type": "null"
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},
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{
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"type": "boolean"
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},
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{
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"type": "number"
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},
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{
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"type": "string"
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},
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{
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"type": "array"
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},
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{
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"type": "object"
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}
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]
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},
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"description": "(Optional) List of parameters this tool accepts"
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"description": "(Optional) JSON Schema for tool inputs (MCP inputSchema)"
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},
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"output_schema": {
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"type": "object",
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"additionalProperties": {
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"oneOf": [
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{
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"type": "null"
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},
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{
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"type": "boolean"
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},
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{
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"type": "number"
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},
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{
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"type": "string"
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},
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{
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"type": "array"
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},
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{
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"type": "object"
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}
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]
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},
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"description": "(Optional) JSON Schema for tool outputs (MCP outputSchema)"
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},
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"metadata": {
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"type": "object",
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@ -12214,68 +12190,6 @@
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"title": "ToolDef",
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"description": "Tool definition used in runtime contexts."
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},
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"ToolParameter": {
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"type": "object",
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"properties": {
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"name": {
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"type": "string",
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"description": "Name of the parameter"
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},
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"parameter_type": {
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"type": "string",
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"description": "Type of the parameter (e.g., string, integer)"
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},
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"description": {
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"type": "string",
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"description": "Human-readable description of what the parameter does"
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},
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"required": {
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"type": "boolean",
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"default": true,
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"description": "Whether this parameter is required for tool invocation"
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},
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"items": {
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"type": "object",
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"description": "Type of the elements when parameter_type is array"
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},
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"title": {
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"type": "string",
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"description": "(Optional) Title of the parameter"
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},
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"default": {
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"oneOf": [
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{
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"type": "null"
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},
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{
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"type": "boolean"
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},
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{
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"type": "number"
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},
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{
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"type": "string"
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},
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{
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"type": "array"
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},
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{
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"type": "object"
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}
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],
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"description": "(Optional) Default value for the parameter if not provided"
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}
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},
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"additionalProperties": false,
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"required": [
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"name",
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"parameter_type",
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"description",
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"required"
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],
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"title": "ToolParameter",
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"description": "Parameter definition for a tool."
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},
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"ListToolDefsResponse": {
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"type": "object",
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"properties": {
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],
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"title": "RegisterToolGroupRequest"
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},
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"Tool": {
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"type": "object",
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"properties": {
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"identifier": {
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"type": "string"
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},
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"provider_resource_id": {
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"type": "string"
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},
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"provider_id": {
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"type": "string"
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},
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"type": {
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"type": "string",
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"enum": [
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"model",
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"shield",
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"vector_db",
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"dataset",
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"scoring_function",
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"benchmark",
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"tool",
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"tool_group",
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"prompt"
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],
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"const": "tool",
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"default": "tool",
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"description": "Type of resource, always 'tool'"
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},
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"toolgroup_id": {
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"type": "string",
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"description": "ID of the tool group this tool belongs to"
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},
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"description": {
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"type": "string",
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"description": "Human-readable description of what the tool does"
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},
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"parameters": {
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"type": "array",
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"items": {
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"$ref": "#/components/schemas/ToolParameter"
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},
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"description": "List of parameters this tool accepts"
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},
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"metadata": {
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"type": "object",
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"additionalProperties": {
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"oneOf": [
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{
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"type": "null"
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},
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{
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"type": "boolean"
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},
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{
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"type": "number"
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},
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{
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"type": "string"
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},
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{
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"type": "array"
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},
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{
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"type": "object"
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}
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]
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},
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"description": "(Optional) Additional metadata about the tool"
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}
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},
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"additionalProperties": false,
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"required": [
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"identifier",
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"provider_id",
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"type",
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"toolgroup_id",
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"description",
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"parameters"
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],
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"title": "Tool",
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"description": "A tool that can be invoked by agents."
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},
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"ListToolsResponse": {
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"type": "object",
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"properties": {
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"data": {
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"type": "array",
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"items": {
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"$ref": "#/components/schemas/Tool"
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},
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"description": "List of tools"
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}
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},
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"additionalProperties": false,
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"required": [
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"data"
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],
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"title": "ListToolsResponse",
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"description": "Response containing a list of tools."
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},
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"VectorDB": {
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"type": "object",
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"properties": {
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