AI agents call find_definition to retrieve information from Graphdb without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries a pre-indexed graph of Ruby on Rails code to locate function/class/method definitions. It performs static analysis retrieval only—no code execution, modification, or deletion occurs. The server description confirms it is a 'queryable graph' used for 'navigating Rails code', reinforcing that this is a read-only introspection tool.
From the tool's definition Tool name is 'find_definition' and description states it will 'Find all definitions matching a simple name'. The verb 'find' and the read-only nature of querying definitions in a static code graph indicates retrieval without modification or side effects.
Attacks that exploit this kind of access
Find all definitions matching a simple name (functions/classes/methods). It is categorised as a Read tool in the Graphdb MCP Server, which means it retrieves data without modifying state.
Register the Graphdb MCP server in PolicyLayer and add a rule for find_definition: 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 Graphdb. Nothing to install.
find_definition 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 find_definition 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 find_definition. 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.
find_definition is provided by the Graphdb MCP server (samagra001/claude-code-graphdb). 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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