# Fetch a tool manifest (latest active version)

GET

/v1/tools/{toolId}

```sh
curl --request GET \
  --url https://example.com/v1/tools/example \
  --header 'Authorization: Bearer <token>'
```

Returns the latest active version of the tool. When all versions are unregistered (retired), the head row still exists but has no active version — the response is 410 tool-gone with the id, distinct from 404 tool-not-found (never registered). An item more than one project serves (an environment order carries it to later environments) answers its newest active version that can run in a project the caller reads, and `404` when there is none. `projectId` narrows that to one project. An item with one project answers its latest active version.

## Authorizations

- **[bearerAuth](https://docs.kindgi.com/v0.1.10/reference/api.md#bearerauth)**

## Parameters

### Path Parameters

**toolId**

required

string

ToolId — dotted namespace (`acme.lookup-order`).

### Query Parameters

**projectId**

string format: uuid

The newest active version that can run in this project, a project the caller reads; `404` when there’s none, or when the caller doesn’t read the project. An item with one project answers its latest version for its own project and `404` for any other; one that names no project (under `kindgi dev`, a pack’s agents, flows and tools) answers it for any. With authorization off, the caller reads every project. An older runtime ignores it and answers the latest version.

## Responses

### 200

Tool manifest.

application/json

object

**id**

required

ToolId — dotted namespace (e.g. `acme.verify-citation`).

string

\>= 1 characters

**projectId**

The tool’s project: every version of a tool is in the one project. Absent when the runtime doesn’t record it: a pack `kindgi dev` serves from disk, or a runtime before Kindgi 0.1.6.

string format: uuid

**description**

required

string

\>= 1 characters

**version**

string

/^\d+\\.\d+\\.\d+$/

**input**

required

JSON Schema (Draft 2020-12) for the tool input.

object

**_key_**

additional properties

any

**output**

required

JSON Schema (Draft 2020-12) for the tool output.

object

**_key_**

additional properties

any

**needs**

Array\<object>

object

**name**

required

string

\>= 1 characters

**optional**

boolean

**effects**

Array\<object>

object

**kind**

required

string

Allowed values: reads writes deletes network spawns-run emits-event external-side-effect sensitive-data-egress

**resource**

string

**notes**

string

**transport**

string

Allowed values: auto native mcp

**mcpEndpoint**

string

**metadata**

object

**_key_**

additional properties

any

**mutating**

Semantic marker: `true` when this tool causes observable side effects (writes state, calls external APIs with mutations, sends messages). Read-only tools set `false`. Absent defaults to `true`. Consumed by the HITL default classifier — a read-only tool passes straight through, a mutating tool asks on first use.

boolean

**needsApprovalWhenUnattended**

`true`: in a run no person started (one whose `startedBy` isn’t `person`), every call of this tool waits for a person’s yes, whatever the agent’s approval rules say, and a flow’s tool step that calls it is refused. Absent means `false`.

boolean

**sandbox**

Isolation posture the runtime enforces around the handler. Optional additive field.

string

Allowed values: none context-isolated strict

**limits**

Sandbox-enforced resource caps at dispatch. Optional additive field.

object

**memMB**

required

integer

\>= 1

**cpuMs**

required

integer

\>= 1

**network**

One of:

- **object**

  Network egress policy. Optional additive field. Discriminated on `kind`.

  object

  **kind**

  required

  string

  Allowed values: none unrestricted

- **object**

  Network egress policy. Optional additive field. Discriminated on `kind`.

  object

  **kind**

  required

  string

  Allowed value: allowlist

  **hosts**

  required

  Array\<string>

**needsSpec**

Typed discriminated needs (env / secrets / config / capabilities / bindings). Optional additive field.

object

**env**

object

**_key_**

additional properties

object

**secrets**

object

**_key_**

additional properties

object

**config**

object

**_key_**

additional properties

object

**capabilities**

Array\<string>

**bindings**

Array\<string>

**codeArtifactRef**

One of:

- **object**

  object

  **kind**

  required

  Allowed value: oci

  **imageRef**

  required

  string

  \>= 1 characters

  **modulePath**

  required

  string

  \>= 1 characters

  **artifactVersion**

  required

  string

  \>= 1 characters

- **object**

  object

  **kind**

  required

  Allowed value: filesystem

  **modulePath**

  required

  string

  \>= 1 characters

**spec**

One of:

- **object**

  Declarative HTTP-invocation spec. Attached to `ToolManifest.spec` under the discriminant `kind: 'http'`. The runtime `Tool.handler` is synthesized by the ‘http’ spec synthesizer to perform URL-template substitution, secret-ref resolution via `ToolContext.resolveSecret`, and the outbound fetch. All fields serialize cleanly to JSON.

  object

  **kind**

  required

  Allowed value: http

  **method**

  required

  string

  Allowed values: GET POST PUT PATCH DELETE

  **urlTemplate**

  required

  URL template with `{param}` placeholders substituted from the tool’s input at invoke time.

  string

  \>= 1 characters

  **headers**

  Array\<object>

  object

  **name**

  required

  string

  \>= 1 characters

  **value**

  required

  string

  **authorization**

  One of:

  - **object**

    object

    **kind**

    required

    Allowed value: bearer

    **secretRef**

    required

    object

    **envName**

    required

    string

    \>= 1 characters

    **name**

    required

    string

    \>= 1 characters

  - **object**

    object

    **kind**

    required

    Allowed value: header

    **headerName**

    required

    string

    \>= 1 characters

    **secretRef**

    required

    object

    **envName**

    required

    string

    \>= 1 characters

    **name**

    required

    string

    \>= 1 characters

  **requestBody**

  One of:

  - **object**

    object

    **kind**

    required

    Allowed value: json-input

  - **object**

    object

    **kind**

    required

    Allowed value: input-passthrough

  - **object**

    object

    **kind**

    required

    Allowed value: text

    **template**

    required

    string

  **timeoutMs**

  Wall-clock timeout in ms. Default 30000.

  integer

  \>= 1

  **parseJson**

  When true (default), the response body is parsed as JSON before returning to the invoker.

  boolean

  **successStatus**

  object

  **min**

  required

  integer

  \>= 100 <= 599

  **max**

  required

  integer

  \>= 100 <= 599

**unregisteredAt**

Present only on an unregistered version: a retired tool (every version unregistered) as `GET /v1/tools?includeRetired=true` lists it.

string format: date-time

**secretScopes**

Where each secret it names is read, by name: recorded by the server when it was registered, never sent by a caller. `null`: none usable (the registrant administers no scope the secret could be read at), until an admin records it again: a tool by publishing a new version, an MCP endpoint by unregistering it and registering it again. Absent on items registered before it was recorded, or on a runtime without a secrets store.

object

**_key_**

additional properties

One of:

- **object**

  One of:

  - **object**

    object

    **kind**

    required

    string

    Allowed value: tenant

  - **object**

    object

    **kind**

    required

    string

    Allowed value: org

    **orgId**

    required

    string format: uuid

  - **object**

    object

    **kind**

    required

    string

    Allowed value: project

    **projectId**

    required

    string format: uuid

- **null**

  null

##### Example

```json
{
  "effects": [
    {
      "kind": "reads"
    }
  ],
  "transport": "auto",
  "sandbox": "none",
  "network": {
    "kind": "none"
  },
  "codeArtifactRef": {
    "kind": "oci"
  },
  "spec": {
    "kind": "http",
    "method": "GET",
    "authorization": {
      "kind": "bearer"
    },
    "requestBody": {
      "kind": "json-input"
    }
  },
  "secretScopes": {
    "additionalProperty": {
      "kind": "tenant"
    }
  }
}
```

### 400

`projectId` is not a project id (a UUID).

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

### 401

Missing / malformed / expired / revoked bearer token.

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

### 404

No tool with that id under this tenant.

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

### 410

Tool retired (all versions unregistered).

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

## See also

- [`GET /v1/tools/{toolId}/versions`: List all versions of a tool](https://docs.kindgi.com/v0.1.10/reference/api/operations/toolslistversions.md)
- [`GET /v1/tools/{toolId}/versions/{version}`: Fetch a specific tool version](https://docs.kindgi.com/v0.1.10/reference/api/operations/toolsgetversion.md)
- [`POST /v1/tools/{toolId}/versions/{version}/unregister`: Unregister a specific tool version](https://docs.kindgi.com/v0.1.10/reference/api/operations/toolsunregister.md)
- [`POST /v1/tools/{toolId}/versions/{version}/reinstate`: Reinstate a specific tombstoned tool version](https://docs.kindgi.com/v0.1.10/reference/api/operations/toolsreinstateversion.md)
- [Every error code](https://docs.kindgi.com/v0.1.10/reference/errors.md)