Get unstaged changes (working tree vs index).
AI agents call git_diff_unstaged to retrieve information from Git MCP Assistant Tool without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads and compares file states to show what has changed in the working directory relative to the index/staging area. It produces no side effects, creates no commits, modifies no files, and cannot be misused to cause destructive or operational harm.
From the tool's definition Tool name 'git_diff_unstaged' and description 'Get unstaged changes (working tree vs index)' indicate a query operation that retrieves and displays differences without modifying repository state.
Attacks that exploit this kind of access
Get unstaged changes (working tree vs index). It is categorised as a Read tool in the Git MCP Assistant Tool MCP Server, which means it retrieves data without modifying state.
Register the Git MCP Assistant Tool MCP server in PolicyLayer and add a rule for git_diff_unstaged: 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 Git MCP Assistant Tool. Nothing to install.
git_diff_unstaged 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 git_diff_unstaged 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 git_diff_unstaged. 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.
git_diff_unstaged is provided by the Git MCP Assistant Tool MCP server (kamiwaza-drew/tool-git). 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.
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