AI agents call search_codebase to retrieve information from Omni Rag without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data from an indexed codebase without creating, modifying, deleting, or executing anything. It is a straightforward read operation with no blast radius beyond potential information disclosure of existing codebase contents.
From the tool's definition Tool description states 'Semantic search over indexed files' — a retrieval operation with no side effects. The name 'search_codebase' and verb 'search' confirm query-only behavior.
Attacks that exploit this kind of access
[Deprecated: use 'search'] Semantic search over indexed files. It is categorised as a Read tool in the Omni Rag MCP Server, which means it retrieves data without modifying state.
Register the Omni Rag MCP server in PolicyLayer and add a rule for search_codebase: 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 Omni Rag. Nothing to install.
search_codebase 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 search_codebase 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 search_codebase. 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.
search_codebase is provided by the Omni Rag MCP server (suyash2013/codebase-rag-mcp). 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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