Reference

ctx_benchmark

Input contract and parameters for ctx_benchmark.

Status by featureReviewed September 2026

MCP tool · Analysis tools

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

Benchmark scope: omit for per-file, "project" for project-wide

formatstring

Output format for project benchmarks: json|markdown|terminal (default terminal)

pathstringRequired

File path to benchmark (required for per-file mode)

Exact JSON schema

Inspect the complete input schema

{
  "properties": {
    "action": {
      "description": "Benchmark scope: omit for per-file, \"project\" for project-wide",
      "type": "string"
    },
    "format": {
      "description": "Output format for project benchmarks: json|markdown|terminal (default terminal)",
      "type": "string"
    },
    "path": {
      "description": "File path to benchmark (required for per-file mode)",
      "type": "string"
    }
  },
  "required": [
    "path"
  ],
  "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

Local representation comparison for a file or project. It reports the selected modes' context size; it does not establish task quality or a universal gain.
WORKFLOW: use before ctx_read when choosing a local representation.
Provide a file path, or use action=project for project-wide results.
ANTIPATTERN: not the Research Performance Benchmark — this tool does not compare matched workloads or quality gates.

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