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

With no annotations, the description carries the full burden and does useful work: it states nothing is bought, ordered or paid, no quote is guaranteed, and the service is free. It also previews the returned content (recipient, consent wording, confirmation method). It could say more about whether calling it has any side effects, but the expectations of the flow are well set.

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?

'Read first' is a good front-loaded opener, but the second sentence is a run-on packing purpose, side-effect disclaimers, and return contents together. It is adequately sized but the density makes it harder to scan than it needs to be.

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?

Given zero parameters, no output schema, and no annotations, the description is the only carrier of meaning, and it covers purpose, side-effect expectations, and the shape of what is returned. An agent has enough to know what it gets without opening anything else.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; per the rubric this is the baseline of 4. The schema is trivially complete.

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?

The description names the resource (an ENQUIRY on a law-firm local SEO flow) and the verb (describe/states plainly + returns details), and the title reinforces that this is informational rather than a purchase. It is separable from siblings because submit_enquiry is the action and this tool explains it. The phrasing is somewhat circular ('states what submit_enquiry does') but the intent is clear.

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?

'Read first' gives an explicit invocation ordering relative to submit_enquiry, which is real when-to-use guidance. It does not spell out when NOT to use it or name enquiry_fields as the alternative, so it stops short of a full 5.

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