Searches codebase for symbols by name or pattern. USE WHEN: finding function/class implementations, exploring unfamiliar code, or locating specific functionality. THIS IS YOUR STARTING POINT when you don't know where code is located. Supports both exact name matching and natural language queries ...
Risk signalsAccepts freeform code/query input (query)
Part of the Codegraph server.
Free to start. No card required.
AI agents call codegraph_symbol_search to retrieve information from Codegraph without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though codegraph_symbol_search only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"codegraph_symbol_search": {}
}
}See the full Codegraph policy for all 38 tools.
These attack patterns abuse exactly the kind of access codegraph_symbol_search gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Searches codebase for symbols by name or pattern. USE WHEN: finding function/class implementations, exploring unfamiliar code, or locating specific functionality. THIS IS YOUR STARTING POINT when you don't know where code is located. Supports both exact name matching and natural language queries (e.g., 'function that validates email addresses'). Returns array of matches, each with: name, kind (function/class/method/variable/interface/type/module), file path, line range, signature, and docstring. Use compact=true for minimal output (name, kind, location only). symbolType filters by kind — use 'any' to search all types.. It is categorised as a Read tool in the Codegraph MCP Server, which means it retrieves data without modifying state.
Register the Codegraph MCP server in PolicyLayer and add a rule for codegraph_symbol_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 Codegraph. Nothing to install.
codegraph_symbol_search 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 codegraph_symbol_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.
Set action: deny in the PolicyLayer policy for codegraph_symbol_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.
codegraph_symbol_search is provided by the Codegraph MCP server (codegraph-ai/CodeGraph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 38 Codegraph tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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