AI agents call find_similar_code to retrieve information from MCP Code Indexer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries code data to find similar code patterns. It performs a read-only search operation with no side effects, no code execution, and no data modification. Consistent with the server's purpose as a code retrieval tool. Severity is low because misuse would only expose existing code information already in the repository.
From the tool's definition Tool name 'find_similar_code' and description '查找相似代码片段' (find similar code snippets) indicate a search/retrieval operation. The server is described as providing 'code repository search capabilities'. No modification, deletion, or execution is implied.
Documented attack patterns abuse exactly the kind of access find_similar_code gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Code Indexer, and nothing reaches the server without passing your rules. This is the rule we recommend for find_similar_code:
{
"version": "1",
"default": "deny",
"tools": {
"find_similar_code": {}
}
}find_similar_code is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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查找相似代码片段. It is categorised as a Read tool in the MCP Code Indexer MCP Server, which means it retrieves data without modifying state.
Register the MCP Code Indexer MCP server in PolicyLayer and add a rule for find_similar_code: 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 MCP Code Indexer. Nothing to install.
find_similar_code 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_similar_code 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_similar_code. 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_similar_code is provided by the MCP Code Indexer MCP server (zxfgds/mcp-code-indexer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 MCP Code Indexer tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
8 MCP Code Indexer tools catalogued and risk-classified — across an index of 42,500+ MCP servers.