Enumerate canonical function/event names in a category. Useful for discovery when query terms are vague.
AI agents call list_functions_by_category to retrieve information from MTA:SA Documentation MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and presents existing documentation metadata (function/event names organized by category). It performs no write, deletion, execution, or financial operations. It is a pure read operation with minimal blast radius—misuse would only waste resources or retrieve unwanted documentation references, causing no harm to systems or data.
From the tool's definition Tool 'list_functions_by_category' enumerates (lists) function/event names in a category. The description explicitly frames this as a discovery/retrieval operation with no side effects.
Attacks that exploit this kind of access
Enumerate canonical function/event names in a category. Useful for discovery when query terms are vague. It is categorised as a Read tool in the MTA:SA Documentation MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MTA:SA Documentation MCP Server MCP server in PolicyLayer and add a rule for list_functions_by_category: 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 MTA:SA Documentation MCP Server. Nothing to install.
list_functions_by_category 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_functions_by_category 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_functions_by_category. 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_functions_by_category is provided by the MTA:SA Documentation MCP Server MCP server (mtasa-docs-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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