Show session savings: total files compressed, tokens saved, estimated cost savings, and context-rot warnings for files read too many times.
AI agents call fullscope_stats to retrieve information from Mcp Agent Opt without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays aggregated session statistics and metrics. It does not create, modify, delete, execute code, or move financial resources. While it reports on cost savings, it only displays estimated information—it does not transact money or commit financial obligations.
From the tool's definition Tool description states it 'Show[s] session savings' and displays metrics like 'total files compressed, tokens saved, estimated cost savings, and context-rot warnings'.
Attacks that exploit this kind of access
Show session savings: total files compressed, tokens saved, estimated cost savings, and context-rot warnings for files read too many times. It is categorised as a Read tool in the Mcp Agent Opt MCP Server, which means it retrieves data without modifying state.
Register the Mcp Agent Opt MCP server in PolicyLayer and add a rule for fullscope_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 Mcp Agent Opt. Nothing to install.
fullscope_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 fullscope_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 fullscope_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.
fullscope_stats is provided by the Mcp Agent Opt MCP server (justguy/fullscope-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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