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

With no annotations, the description carries the full burden, and it does disclose meaningful behavioral facts: nothing is bought/ordered/paid, no quote is guaranteed, and it is free — directly answering an agent's concern about whether calling this commits to anything. It stops short of stating operational traits like read-only status or idempotence explicitly, but the implied safe-read framing is adequate.

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 "Read first." and compact at three sentences. Slight redundancy and awkward phrasing ("States plainly what submit_enquiry does on PPC marketing company") cost it the top mark.

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 zero-parameter reader with no output schema, the description compensates by describing what is returned: who receives the details, the consent wording, and how the person confirms. That covers the return content well, though it could state outright that the output is static explanatory text.

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 to document and the baseline is 4. The description correctly implies a parameterless, informational call.

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 a read tool that returns an explanation of what submit_enquiry does (an enquiry with human providers, no purchase, no guaranteed quote). The verb/resource is conveyed, but it references only submit_enquiry and never distinguishes itself from enquiry_fields, so sibling differentiation is incomplete.

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" is an explicit ordering cue telling the agent to consult this before acting on submit_enquiry. It gives clear context for use but names no exclusions or alternatives among the siblings.

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