sync_planning_doc · Claude Session MCP: Risk & Policy

WHAT IT DOES

What sync_planning_doc does on Claude Session MCP

AI agents use sync_planning_doc to create or update resources in Claude Session MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Claude Session MCP environment.

WHY IT NEEDS A POLICY

Why sync_planning_doc needs a policy

The tool creates or modifies data (planning documentation and task status) without permanent deletion. While modifications to project planning are important, they are reversible (can be edited or reverted). The blast radius is medium: erroneous updates could confuse a team about project state or task completion, but no financial, operational, or destructive consequences occur.

From the tool's definition Tool description states it can 'append to progress log, update active work, or mark tasks complete' — these are reversible modifications to planning documents in .context/dev/{branch}/ directory.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sync_planning_doc Rate-limited

sync_planning_doc stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sync_planning_doc": {
      "limits": [
        {
          "counter": "sync_planning_doc_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Claude Session MCP, so you can run agents against it safely.

FAQ

Questions about sync_planning_doc

What does the sync_planning_doc tool do? +

Update .context/dev/{branch}/ planning documents. Can append to progress log, update active work, or mark tasks complete. It is categorised as a Write tool in the Claude Session MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on sync_planning_doc? +

Register the Claude Session MCP server in PolicyLayer and add a rule for sync_planning_doc: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Claude Session MCP. Nothing to install.

What risk level is sync_planning_doc? +

sync_planning_doc is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit sync_planning_doc? +

Yes. Add a rate_limit block to the sync_planning_doc rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block sync_planning_doc completely? +

Set action: deny in the PolicyLayer policy for sync_planning_doc. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides sync_planning_doc? +

sync_planning_doc is provided by the Claude Session MCP server (timevans/ccsession). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.