AI agents call repo_stats to retrieve information from Restic without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool purely queries and returns statistical information about the repository without creating, modifying, deleting, or executing any operations. It is a passive read-only operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool name is 'repo_stats' and description states it retrieves repository statistics (size, file count, dedup ratio) with no modification or side effects mentioned.
Attacks that exploit this kind of access
Get repository statistics including size, file count, and dedup ratio. It is categorised as a Read tool in the Restic MCP Server, which means it retrieves data without modifying state.
Register the Restic MCP server in PolicyLayer and add a rule for repo_stats: 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 Restic. Nothing to install.
repo_stats 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 repo_stats 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 repo_stats. 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.
repo_stats is provided by the Restic MCP server (mohsenil85/restic-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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