Get diagnostics for a specific file path
AI agents call get_file_diagnostics to retrieve information from Diagnostics 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 diagnostic information from VS Code for a specified file. It performs a query operation that returns existing diagnostic data without creating, modifying, deleting, or executing anything. The worst-case misuse would be an agent gathering diagnostic information about files, which has minimal security impact.
From the tool's definition Tool name 'get_file_diagnostics' and description 'Get diagnostics for a specific file path' indicate a read-only retrieval operation.
Attacks that exploit this kind of access
Get diagnostics for a specific file path. It is categorised as a Read tool in the Diagnostics MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Diagnostics MCP Server MCP server in PolicyLayer and add a rule for get_file_diagnostics: 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 Diagnostics MCP Server. Nothing to install.
get_file_diagnostics 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 get_file_diagnostics 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 get_file_diagnostics. 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.
get_file_diagnostics is provided by the Diagnostics MCP Server MCP server (maaz0313-png/diagnostics-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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