Compare two performance snapshots for a website. Shows metric deltas with percentage changes and a human-readable assessment. By default compares the latest two snapshots, or specify snapshot IDs.
AI agents call compare_snapshots to retrieve information from Pulspeed without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
compare_snapshots retrieves and presents performance data for analysis. It reads existing snapshots, computes differences, and returns a human-readable assessment. There are no side effects, no data modification, no code execution, and no irreversible actions. This is a classic Read operation: query existing data and present results.
From the tool's definition Tool description states it 'Compare[s] two performance snapshots' and 'Shows metric deltas' — purely retrieval and analysis operations with no modification or execution of external systems.
Attacks that exploit this kind of access
Compare two performance snapshots for a website. Shows metric deltas with percentage changes and a human-readable assessment. By default compares the latest two snapshots, or specify snapshot IDs. It is categorised as a Read tool in the Pulspeed MCP Server, which means it retrieves data without modifying state.
Register the Pulspeed MCP server in PolicyLayer and add a rule for compare_snapshots: 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 Pulspeed. Nothing to install.
compare_snapshots 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 compare_snapshots 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 compare_snapshots. 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.
compare_snapshots is provided by the Pulspeed MCP server (pulspeed/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
compare_snapshots is one line of Pulspeed's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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