AI agents call get_tool_definitions to retrieve information from Mcpcodeserver without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation to query and return metadata (TypeScript definitions) about available tools. There is no capability to execute code, modify data, delete resources, or commit financial transactions. The worst plausible misuse would be information disclosure about tool signatures, which has minimal blast radius. Confidence is high because the description is clear and unambiguous.
From the tool's definition The tool retrieves TypeScript definitions for MCP tools—a non-destructive information retrieval operation. The description explicitly states 'Get' (retrieve), with no mention of execution, modification, deletion, or side effects.
Documented attack patterns abuse exactly the kind of access get_tool_definitions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcpcodeserver, and nothing reaches the server without passing your rules. This is the rule we recommend for get_tool_definitions:
{
"version": "1",
"default": "deny",
"tools": {
"get_tool_definitions": {}
}
}get_tool_definitions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get TypeScript definitions for MCP tools. It is categorised as a Read tool in the Mcpcodeserver MCP Server, which means it retrieves data without modifying state.
Register the Mcpcodeserver MCP server in PolicyLayer and add a rule for get_tool_definitions: 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 Mcpcodeserver. Nothing to install.
get_tool_definitions 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_tool_definitions 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_tool_definitions. 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_tool_definitions is provided by the Mcpcodeserver MCP server (zbowling/mcpcodeserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcpcodeserver, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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3 Mcpcodeserver tools catalogued and risk-classified — across an index of 43,000+ MCP servers.