build_search_index · Memex Targeted Search Server MCP

WHAT IT DOES

What build_search_index does on Memex Targeted Search Server

AI agents invoke build_search_index to trigger actions in Memex Targeted Search Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why build_search_index needs a policy

Building or rebuilding a search index is an operation that executes a potentially expensive background process, modifying the server's internal index data structures. It is not a simple read, nor does it irreversibly destroy user data, but it does trigger an external operation with side effects (replacing/overwriting the existing index).

From the tool's definition 'Build or rebuild the search index' — triggers an index construction/reconstruction operation that modifies internal state and consumes resources

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

build_search_index Rate-limited

build_search_index stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_search_index": {
      "limits": [
        {
          "counter": "build_search_index_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about build_search_index

What does the build_search_index tool do? +

Build or rebuild the search index for better performance. It is categorised as a Execute tool in the Memex Targeted Search Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on build_search_index? +

Register the Memex Targeted Search Server MCP server in PolicyLayer and add a rule for build_search_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 Memex Targeted Search Server. Nothing to install.

What risk level is build_search_index? +

build_search_index is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit build_search_index? +

Yes. Add a rate_limit block to the build_search_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_search_index completely? +

Set action: deny in the PolicyLayer policy for build_search_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_search_index? +

build_search_index is provided by the Memex Targeted Search Server MCP server (memextech/memex-targeted-search-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.