dev.crates-search

SERVERMcp SOURCE@2sio/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-2s-io-mcp/dev.crates-search.md

WHAT IT DOES

What dev.crates-search does on Mcp

AI agents call dev.crates-search to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why dev.crates-search is rated Low

This is a read-only search tool that queries public package registry data and returns informational results. No side effects, state changes, code execution, or financial transactions occur. Low severity because misuse results only in information retrieval from a public source, with no blast radius for system integrity or user assets.

From the tool's definition Tool description explicitly states it 'Search[es] crates.io' and returns metadata (name, version, description, downloads, links). No modification, deletion, or execution capability mentioned. Described as discovery/vetting function.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs dev.crates-search safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For dev.crates-search, this is the rule to start with:

dev.crates-search Allowed

dev.crates-search is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "dev.crates-search": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every dev.crates-search call is checked against it from then on.

FAQ

Questions about dev.crates-search

What does the dev.crates-search tool do? +

Search crates.io for Rust packages (keyless). Each result: name, latest stable version, description, total + recent downloads, and repository/homepage/documentation links. For agents discovering or vetting Rust dependencies. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on dev.crates-search? +

Register the MCP server in PolicyLayer and add a rule for dev.crates-search: 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. Nothing to install.

What risk level is dev.crates-search? +

dev.crates-search is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit dev.crates-search? +

Yes. Add a rate_limit block to the dev.crates-search 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 dev.crates-search completely? +

Set action: deny in the PolicyLayer policy for dev.crates-search. 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 dev.crates-search? +

dev.crates-search is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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