List all available code categories and common questions
AI agents call list_code_categories to retrieve information from DIY Helper MCP Servers without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool simply enumerates or retrieves existing code category metadata and FAQs. It has no side effects, does not execute operations, does not modify data, and does not commit financial or destructive actions. The blast radius of misuse is minimal—an attacker could only learn what code categories exist, which is non-sensitive informational content about building standards.
From the tool's definition Tool name 'list_code_categories' and description 'List all available code categories and common questions' indicate a retrieval/query operation that returns informational data about code categories without modifying, executing, or deleting anything.
Attacks that exploit this kind of access
List all available code categories and common questions. It is categorised as a Read tool in the DIY Helper MCP Servers MCP Server, which means it retrieves data without modifying state.
Register the DIY Helper MCP Servers MCP server in PolicyLayer and add a rule for list_code_categories: 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 DIY Helper MCP Servers. Nothing to install.
list_code_categories 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 list_code_categories 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 list_code_categories. 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.
list_code_categories is provided by the DIY Helper MCP Servers MCP server (jrszilard/diy-helper-mcp-servers). 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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