Search for symbols across ALL other indexed projects in the shared graph database. USE WHEN: finding cross-repo dependencies, discovering API consumers in other services, or understanding how a symbol is used across the organization. Returns matches with project attribution (which project, file p...
Risk signalsAccepts freeform code/query input (query)
Part of the Codegraph server.
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AI agents call codegraph_cross_project_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_cross_project_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_cross_project_search": {}
}
}See the full Codegraph policy for all 38 tools.
These attack patterns abuse exactly the kind of access codegraph_cross_project_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.
Search for symbols across ALL other indexed projects in the shared graph database. USE WHEN: finding cross-repo dependencies, discovering API consumers in other services, or understanding how a symbol is used across the organization. Returns matches with project attribution (which project, file path, line numbers). Only searches projects that have been previously indexed by codegraph. Does NOT search the current project (use symbol_search for that).. 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_cross_project_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_cross_project_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_cross_project_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_cross_project_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_cross_project_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.
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