Reference

ctx_control

Input contract and parameters for ctx_control.

Status by featureReviewed September 2026

MCP tool · Planning 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.

actionstringRequired

reasonstring

Reason for the action

scopestring

call (this turn only), session (rest of this session), project (persists)

targetstring

@F1 handle (ctx_compile reference) or file path or item ID

valuestring

New content, view name, or priority

Exact JSON schema

Inspect the complete input schema

{
  "properties": {
    "action": {
      "description": "exclude|include|pin|unpin|set_view|set_priority|mark_outdated|reset|list|history",
      "type": "string"
    },
    "reason": {
      "description": "Reason for the action",
      "type": "string"
    },
    "scope": {
      "description": "call (this turn only), session (rest of this session), project (persists)",
      "type": "string"
    },
    "target": {
      "description": "@F1 handle (ctx_compile reference) or file path or item ID",
      "type": "string"
    },
    "value": {
      "description": "New content, view name, or priority",
      "type": "string"
    }
  },
  "required": [
    "action"
  ],
  "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

Fine-tune context — exclude, include, pin, unpin, set_view, set_priority, mark_outdated, reset, list, history.
Overlay-based, reversible, scoped to call/session/project.
WORKFLOW: after ctx_compose, exclude low-relevance files.
ANTIPATTERN: not for initial context building — use ctx_compose/ctx_read first.

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