build_docs_index · MCP Local Context MCP: Risk & Policy

WHAT IT DOES

What build_docs_index does on MCP Local Context

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

WHY IT NEEDS A POLICY

Why build_docs_index needs a policy

Based on the tool name and server context (local documentation with RAG capabilities), 'build_docs_index' most likely builds or rebuilds a search/vector index over local documents. This is a Write-level operation — it creates or modifies an index artifact — but is reversible (the index can be rebuilt). It does not delete source documents.

From the tool's definition Tool name 'build_docs_index' — description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

build_docs_index Rate-limited

build_docs_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": {
    "build_docs_index": {
      "limits": [
        {
          "counter": "build_docs_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 Local Context, so you can run agents against it safely.

FAQ

Questions about build_docs_index

What does the build_docs_index tool do? +

build_docs_index. It is categorised as a Write tool in the MCP Local Context MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on build_docs_index? +

Register the MCP Local Context MCP server in PolicyLayer and add a rule for build_docs_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 Local Context. Nothing to install.

What risk level is build_docs_index? +

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

Can I rate-limit build_docs_index? +

Yes. Add a rate_limit block to the build_docs_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 build_docs_index completely? +

Set action: deny in the PolicyLayer policy for build_docs_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 build_docs_index? +

build_docs_index is provided by the MCP Local Context MCP server (steedmonteiro/mcp-local-context). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.