Fetch the full contents of a specific file from a GitHub repo.
AI agents call tool_get_file to retrieve information from Codelens-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data (file contents) from a public GitHub repository with no side effects. It matches the Read category definition: 'retrieves or queries data; no side effects.' Since it operates on public repositories and merely reads existing files without modifying, executing code, or causing destructive actions, severity is low. Confidence is high because the description is explicit and unambiguous.
From the tool's definition Tool fetches full contents of a specific file from a GitHub repo; no creation, modification, deletion, or execution implied. Action is explicitly retrieval-only.
Attacks that exploit this kind of access
Fetch the full contents of a specific file from a GitHub repo. It is categorised as a Read tool in the Codelens-MCP MCP Server, which means it retrieves data without modifying state.
Register the Codelens- MCP server in PolicyLayer and add a rule for tool_get_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 Codelens-MCP. Nothing to install.
tool_get_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 tool_get_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 tool_get_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.
tool_get_file is provided by the Codelens- MCP server (yashkashte5/codelens-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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