Measure if key information was retrieved by checking topic coverage
AI agents call rag.evaluate_retrieval_coverage to retrieve information from ContextForge MCP Gateway without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs passive analysis and measurement of retrieved information to assess coverage completeness. It retrieves or analyzes data without side effects—a characteristic Read operation. The low severity reflects that misuse would only yield incorrect measurements or reports, with no irreversible or external impacts.
From the tool's definition Tool name 'evaluate_retrieval_coverage' and description 'Measure if key information was retrieved by checking topic coverage' indicate a query or measurement operation. The verb 'evaluate' and 'measure' suggest data inspection without modification.
Attacks that exploit this kind of access
Measure if key information was retrieved by checking topic coverage. It is categorised as a Read tool in the ContextForge MCP Gateway MCP Server, which means it retrieves data without modifying state.
Register the ContextForge MCP Gateway MCP server in PolicyLayer and add a rule for rag.evaluate_retrieval_coverage: 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 ContextForge MCP Gateway. Nothing to install.
rag.evaluate_retrieval_coverage 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 rag.evaluate_retrieval_coverage 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 rag.evaluate_retrieval_coverage. 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.
rag.evaluate_retrieval_coverage is provided by the ContextForge MCP Gateway MCP server (jrmatherly/mcp-context-forge). 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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