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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds one genuinely useful behavioral fact: the returned link is unsigned and carries no embedded token, which matters for security and sharing decisions. It stops short of saying whether the URL is stable, whether it expires, or what it looks like.

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?

Two short sentences, the core function front-loaded, with no filler or repetition. Every sentence carries information the schema does not.

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 two-parameter tool with zero schema description coverage and no output schema, the description leaves too much open: no URL format or example, no per-target semantics, no indication of how `expertId` interacts with `target`. The reader understands the shape of the output artifact but not how to produce a correct call.

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%, so the description carries the full burden and largely fails: neither `target` nor `expertId` is mentioned. Critically, the implicit rule that `expertId` is presumably required when target=expert (and ignored otherwise) is never stated, and the enum values are never explained.

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?

"Builds a ... URL" gives a specific verb and resource, which is better than a tautology. But "Callpaymin" is unexplained jargon and "a known page" defers entirely to the schema enum, so an agent cannot tell what kinds of pages are addressable or how this differs from any sibling. Adequate but vague on scope.

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?

No guidance on when to use this, whether it is a prerequisite for another flow, or who needs the resulting URL. The only boundary information (not signed, no token) describes the artifact's nature rather than when to call the tool. An agent must guess the use case.

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