AI agents call test_gap_intelligence_from_git_diff to retrieve information from Sfgraph without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only analysis tool that queries the local knowledge graph to report on test coverage status. It retrieves and presents information about code dependencies and their test states without making any modifications, executing arbitrary code, or causing side effects. The blast radius of misuse is minimal—worst case, an agent could request analysis repeatedly, but no data is changed or destroyed.
From the tool's definition Tool name contains 'List dependents' and description indicates it analyzes test coverage gaps without modifying, deleting, or executing code. The action is purely informational—querying the knowledge graph to identify which dependents lack test coverage.
Attacks that exploit this kind of access
List dependents of a git diff that have no test coverage. It is categorised as a Read tool in the Sfgraph MCP Server, which means it retrieves data without modifying state.
Register the Sfgraph MCP server in PolicyLayer and add a rule for test_gap_intelligence_from_git_diff: 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 Sfgraph. Nothing to install.
test_gap_intelligence_from_git_diff 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 test_gap_intelligence_from_git_diff 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 test_gap_intelligence_from_git_diff. 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.
test_gap_intelligence_from_git_diff is provided by the Sfgraph MCP server (ryanstark24/sfgraph). 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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