getItemDefinition
AI agents call getItemDefinition to retrieve information from Mcp Docsrs without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves definition information for items (functions, types, etc.) in Rust crates, which is a non-destructive read operation. It has no side effects—it only queries and returns documentation data. No data is modified, executed, or deleted. The blast radius of misuse is minimal; an AI could request definitions repeatedly or for non-existent items, but this causes no harm to systems or data.
From the tool's definition Tool name 'getItemDefinition' and server context indicate retrieval of API definitions from Rust crate documentation. Sibling tools (getCrateInfo, getItemExamples, listFeatures, searchCrates, searchInCrate) all perform read-only queries of documentation.
Attacks that exploit this kind of access
getItemDefinition. It is categorised as a Read tool in the Mcp Docsrs MCP Server, which means it retrieves data without modifying state.
Register the Mcp Docsrs MCP server in PolicyLayer and add a rule for getItemDefinition: 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 Docsrs. Nothing to install.
getItemDefinition is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the getItemDefinition 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.
Set action: deny in the PolicyLayer policy for getItemDefinition. 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.
getItemDefinition is provided by the Mcp Docsrs MCP server (shuakami/mcp-docsrs). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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