Generate a clear and informative docstring for the given function.
AI agents use generate_function_docstring_tool to create or update resources in FastMCP Boilerplate — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FastMCP Boilerplate environment.
The tool generates documentation strings for functions, which creates new data (docstrings) or modifies existing function metadata. This is a write operation because it creates or updates docstring content. It is reversible (docstrings can be edited or removed), so not Destructive. It does not execute code or queries, does not move funds, and does not have side effects beyond documentation.
From the tool's definition Tool name includes 'generate' and description states it will 'Generate a clear and informative docstring for the given function.' This action creates or modifies docstring documentation, which is reversible text content.
Documented attack patterns abuse exactly the kind of access generate_function_docstring_tool gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and FastMCP Boilerplate, and nothing reaches the server without passing your rules. This is the rule we recommend for generate_function_docstring_tool:
{
"version": "1",
"default": "deny",
"tools": {
"generate_function_docstring_tool": {
"limits": [
{
"counter": "generate_function_docstring_tool_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}generate_function_docstring_tool stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Generate a clear and informative docstring for the given function. It is categorised as a Write tool in the FastMCP Boilerplate MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the FastMCP Boilerplate MCP server in PolicyLayer and add a rule for generate_function_docstring_tool: 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 FastMCP Boilerplate. Nothing to install.
generate_function_docstring_tool is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the generate_function_docstring_tool 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 generate_function_docstring_tool. 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.
generate_function_docstring_tool is provided by the FastMCP Boilerplate MCP server (rainer85ah/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from FastMCP Boilerplate, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
16 FastMCP Boilerplate tools catalogued and risk-classified — across an index of 43,000+ MCP servers.