Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent and non-destructive, so safety is covered; the description adds real context on top – silent changes without a new version, risk escalation semantics, a per-check charge routed through list_paid_tools, and the 'reads the map only' scope. Lacks detail on return format, but that is secondary here.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Dense but front-loaded: usage trigger first, then what it returns, then the escalation consequence, then cost and scope. Every sentence carries weight, though the risk-example parenthetical makes the middle clause slightly heavy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a four-parameter tool with a nested object and no output schema, the description conveys what the result substantively contains (changed tools, risk movement) and the cost/scope constraints. It stops short of describing the exact response fields, which is the only meaningful gap.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so all four parameters including the nested last_trip object are already documented. The description only lightly reinforces 'since that date' and the paid/license dimension; it adds little syntax or meaning beyond the schema, matching the baseline 3.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource – it reports whether an approved MCP server's tools changed and whether risk rose, with concrete examples of risky change (deletes, pays, runs code). It does not, however, distinguish itself from close siblings like changes_since or verify_lock, so an agent cannot tell them apart from the text alone.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit trigger: 'Use this before reusing an MCP server that a person approved earlier,' plus a follow-up rule ('If the risk went up, ask the person to approve again before calling it'). Strong when-to-use guidance, but it names no alternative tool for the adjacent cases (e.g. when there is no prior approval).

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.