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 meaningful behavioral facts: nothing is bought/ordered/paid, no quote is guaranteed, and it is free. 'Read first' implies a safe read operation. It still doesn't state its own side-effect profile or freshness/stability of the returned copy explicitly, so the coverage is partial.

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?

Front-loaded with the 'Read first' imperative, then the substantive content. It is appropriately short for a no-argument informational tool, though the sentence about 'who receives the details, the consent wording, and how the person confirms' is slightly listy.

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?

With no output schema and no annotations, the description usefully sketches the returned content (recipients, consent wording, confirmation method), which compensates for the missing output schema. It is largely complete for a trivial zero-parameter tool.

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 the baseline is 4; there is nothing for the description to document and it correctly adds no parameter noise.

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 makes clear this is an informational/descriptive tool that explains what submit_enquiry does on 'Web design Sussex', and it names the sibling it relates to. It doesn't distinguish itself from enquiry_fields, which is the other obvious sibling, so an agent must infer the split between 'describe' and 'fields'.

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 sequencing hint, implying the agent should call this before submit_enquiry. However, it never states when to prefer enquiry_fields, nor any exclusion, so the routing guidance is only implied rather than spelled out.

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