AI agents call codebase_map to retrieve information from Srclight without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to generate or return a map/visualization of the codebase structure, which is a read-only operation that retrieves data without side effects. The server's core purpose is indexing and navigation. Confidence is moderate (0.7) because the tool description is empty, preventing direct confirmation of its exact function.
From the tool's definition Tool name 'codebase_map' combined with server description indicating navigation, search, and exploration capabilities ('navigate call graphs, explore inheritance').
Documented attack patterns abuse exactly the kind of access codebase_map gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Srclight, and nothing reaches the server without passing your rules. This is the rule we recommend for codebase_map:
{
"version": "1",
"default": "deny",
"tools": {
"codebase_map": {}
}
}codebase_map is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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codebase_map. It is categorised as a Read tool in the Srclight MCP Server, which means it retrieves data without modifying state.
Register the Srclight MCP server in PolicyLayer and add a rule for codebase_map: 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 Srclight. Nothing to install.
codebase_map 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 codebase_map 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 codebase_map. 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.
codebase_map is provided by the Srclight MCP server (srclight/srclight). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 42 Srclight tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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42 Srclight tools catalogued and risk-classified — across an index of 42,500+ MCP servers.