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 the two most important traits: immediate, non-confirmed execution and a write side effect (provisioning a lead row) under the public role. It omits auth requirements, idempotency/duplicate-call behavior, and reversibility, which matter for a mutation endpoint.

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?

Three sentences, front-loaded with the action, then the execution semantics, then the rationale. The parenthetical business-rule sentence is long and somewhat tangential, but it explains why the endpoint exists rather than padding.

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 16-parameter mutation tool with 0% schema coverage and no output schema, the description leaves critical gaps: no parameter guidance, no auth/permission context, and only a vague 'the result tells you what happened' instead of what the result contains.

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 0% across 16 parameters, and the description adds no field-level meaning at all beyond 'gather everything it needs.' It doesn't clarify the 3 required fields (email, full-name, project-type) or the enum vocabularies, so the agent must infer everything from bare property names.

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 and even the HTTP route ('Run "Book a discovery call" (POST /discovery/book)'), so the action is unambiguous. However, it offers no differentiation from the sibling endpoints (endpoint-public-post/posts), and those siblings are plausibly adjacent contact/lead flows, so an agent gets no help choosing between them.

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?

Explicitly states the precondition for calling: it executes immediately with no separate confirmation step, so gather everything needed from the user first. That is real when-to-use guidance, but it never names an alternative tool or a when-not-to-use case.

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