index · Mcp Fts5 Starter MCP: Risk & Policy

WHAT IT DOES

What index does on Mcp Fts5 Starter

AI agents use index to create or update resources in Mcp Fts5 Starter — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Fts5 Starter environment.

WHY IT NEEDS A POLICY

Why index needs a policy

This tool writes/updates the FTS5 search index by syncing files from the corpus directory. It creates or modifies index entries incrementally based on file modification times. It does not delete data irreversibly nor execute arbitrary code, making Write the most appropriate category. Misuse could corrupt or pollute the search index, but effects are generally reversible by re-indexing.

From the tool's definition Re-sync the corpus directory into the FTS5 index. Incremental by mtime.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

index Rate-limited

index 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": {
    "index": {
      "limits": [
        {
          "counter": "index_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 Mcp Fts5 Starter, so you can run agents against it safely.

FAQ

Questions about index

What does the index tool do? +

Re-sync the corpus directory into the FTS5 index. Incremental by mtime. It is categorised as a Write tool in the Mcp Fts5 Starter MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on index? +

Register the Mcp Fts5 Starter MCP server in PolicyLayer and add a rule for index: 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 Mcp Fts5 Starter. Nothing to install.

What risk level is index? +

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

Can I rate-limit index? +

Yes. Add a rate_limit block to the index 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 index completely? +

Set action: deny in the PolicyLayer policy for index. 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 index? +

index is provided by the Mcp Fts5 Starter MCP server (zx22413/mcp-fts5-starter). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.