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

With no annotations, the description carries the full burden and does disclose concrete operational facts: reads at a URL, checks the named clause, compares a fingerprint to a recorded copy, and explicitly states Credential: none and Cost: Free. It omits failure/error behavior and what a mismatch response looks like, keeping it short of 5.

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?

Well front-loaded: intent, then behavior, then the scope caveat, then credential/cost/source metadata. Slightly chatty with the first-person framing and the trailing 'Source: Rule 2.5', but every sentence is short and carries information.

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 tool with no annotations, no output schema, and 3 params, this covers purpose, safety posture (credential-free, free), and the checks performed. It leaves some gaps around return shape and error cases, but an agent can invoke it correctly from what is given.

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 coverage is 67%, and the required 'url' parameter has no description anywhere. The description gestures at the fingerprint/copy comparison — which maps loosely to atrHash — but never mentions url, atrHash, or clauseId by name nor explains their formats, so it fails to compensate for the coverage gap.

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 — reads terms at a web address, checks for Peregrini's clause, and reports fingerprint match. It also explicitly scopes what it does NOT do ('not whether every term is fair'), letting an agent distinguish it from verify_judgment and verify_moltbook without opening a schema.

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?

The opening 'I want to check the terms another agent is asking me to accept' gives clear context for when to reach for this tool, and the closing scope statement carves out one boundary. However, it names no alternative verify_* sibling, so the agent must infer routing on its own.

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