Fetch the SHA of the latest commit.
AI agents call get_latest_sha to retrieve information from Downscoping without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries commit metadata (the latest SHA) without modifying, executing, or deleting any data. It is a read-only operation that retrieves information from a version control system. The minimal blast radius from misuse (an AI agent fetching a commit SHA) and lack of side effects clearly classify it as Read with low severity.
From the tool's definition Tool name 'get_latest_sha' and description 'Fetch the SHA of the latest commit' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Fetch the SHA of the latest commit. It is categorised as a Read tool in the Downscoping MCP Server, which means it retrieves data without modifying state.
Register the Downscoping MCP server in PolicyLayer and add a rule for get_latest_sha: 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 Downscoping. Nothing to install.
get_latest_sha 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_latest_sha 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_latest_sha. 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_latest_sha is provided by the Downscoping MCP server (kbroughton/downscoping-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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