Reference

ctx_tools

Input contract and parameters for ctx_tools.

Status by featureReviewed September 2026

MCP tool · Read, search & shell

Call this tool through your MCP client. Its availability depends on your active configuration and profile.

This registry contract is separate from the SDK. For terminal commands, use the CLI reference.

Parameters

Generated from the registered input schema. “Required” reflects the schema; individual actions can impose additional requirements.

actionstring

find|call|list|refresh

Accepted: findcalllistrefresh

argumentsobject

Arguments for downstream tool (call)

querystring

What you want to do (for find)

toolstring

`server::tool` handle (for call)

Exact JSON schema

Inspect the complete input schema

{
  "properties": {
    "action": {
      "description": "find|call|list|refresh",
      "enum": [
        "find",
        "call",
        "list",
        "refresh"
      ],
      "type": "string"
    },
    "arguments": {
      "description": "Arguments for downstream tool (call)",
      "type": "object"
    },
    "query": {
      "description": "What you want to do (for find)",
      "type": "string"
    },
    "tool": {
      "description": "`server::tool` handle (for call)",
      "type": "string"
    }
  },
  "required": [],
  "type": "object"
}

Runtime description

The following is the tool's own agent-facing description, reproduced from the reviewed registry. It can contain implementation terminology; it does not expand the public stability commitment.

Read the agent-facing description

Gateway to downstream MCP servers — unlimited external tools at ~constant context cost.
actions: find (query → top-N relevant tools) | call (proxy a server::tool) |
list (servers+counts) | refresh.
WORKFLOW: find to discover, then call the chosen server::tool.
ANTIPATTERN: not for built-in tools — use those directly.

Sources & versions3 references Reviewed 18 Sept 2026

mcp_manifest.rsrust/src/core/mcp_manifest.rsReviewed checkout
registry.rsrust/src/server/registry.rsReviewed checkout
dynamic_tools.rsrust/src/server/dynamic_tools.rsReviewed checkout

Core checkout: 50fbff09c9
Installed runtime: 3.10.2
SDK release: 1.1.0

Separate baselines for source, CLI/configuration and SDK contracts. Review does not certify every platform or integration.

Versions & compatibility