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

With no annotations, the description carries the full burden and largely discharges it: it discloses validation, the returned summary/consent line/token, the double opt-in email flow, and that no provider sees the data until the link is clicked. It omits failure modes (what happens on invalid answers or a bad token) and any auth/rate context, which keeps it short of a 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?

Front-loaded with the purpose and the two negations, then structured as Step 1 / Step 2, so the reader can stop early. It is dense and long, and the full consent sentence is duplicated verbatim in the schema, which costs some economy without much loss of clarity.

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?

There is no output schema and no annotations, so the description must cover the interaction contract, and it does: both calls, their inputs, the interim return values, the terminal email-confirmation gate, and the exact meaning of consent. Nothing an agent needs to drive the two calls correctly is missing.

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 the baseline is 3, but the description adds real meaning: answers are 'keyed by field key from enquiry_fields', consent must be true only under the stated agreement, and confirmation is the token from step 1 after the person approves the summary. That sequencing constraint is not derivable from the schema alone.

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+resource ('Submits an enquiry to SR&ED Finder') and immediately disambiguates with two negations ('NOT a purchase, NOT a guaranteed quote'). An agent can tell this apart from the compare_* and enquiry_* descriptor siblings without opening any 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 two-step protocol is spelled out explicitly: Step 1 requires answers + consent=true and returns a summary/consent line/token; Step 2 fires 'only if the person agrees' with the same answers plus the token. The gating condition and the alternative (not calling step 2) are both stated.

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