AI agents call get_code_structure 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 queries and retrieves static information about code structure—classes, functions, and dependency relationships. It has no side effects, does not modify code, execute operations, delete data, or move money. It is purely informational retrieval, matching the 'Read' category.
From the tool's definition Tool name 'get_code_structure' and description state it retrieves code structure information (classes, functions, dependencies).
Documented attack patterns abuse exactly the kind of access get_code_structure 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 get_code_structure:
{
"version": "1",
"default": "deny",
"tools": {
"get_code_structure": {}
}
}get_code_structure is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取代码结构信息（类、函数、依赖关系）. 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 get_code_structure: 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.
get_code_structure 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 get_code_structure 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 get_code_structure. 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.
get_code_structure 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.