Fetch the complete content of a file.
AI agents call fetch_file to retrieve information from MCP Documentation Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves file content from the documentation server with no side effects, modification, deletion, or code execution capabilities. It is a straightforward read operation returning static documentation content. The low severity reflects minimal blast radius—an AI agent misusing this tool would only access documentation it likely should not, not compromise system integrity or data.
From the tool's definition Tool name 'fetch_file' and description 'Fetch the complete content of a file' indicate retrieval without modification. The server context confirms this is a documentation retrieval system using 'search_docs' and 'list_documents' sibling tools.
Attacks that exploit this kind of access
Fetch the complete content of a file. It is categorised as a Read tool in the MCP Documentation Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Documentation Server MCP server in PolicyLayer and add a rule for fetch_file: 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 Documentation Server. Nothing to install.
fetch_file 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 fetch_file 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 fetch_file. 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.
fetch_file is provided by the MCP Documentation Server MCP server (mckhanster/mcp-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.
Teams ship this data inside their own products. See what a licence covers →