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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so the safety profile is covered. The description earns extra credit by disclosing the return shape (profile, rate, scheduling rules) and, importantly, the privacy boundary — no email or phone — which steers the agent away from promising contact details. It does not state what happens for a non-approved or unknown expertId.

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 tightly packed sentences with zero filler; the payload contents are front-loaded and the negative scope follows immediately. Nothing could be removed without losing information.

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 one-parameter read tool with rich annotations and no output schema, the description adequately conveys what comes back and what is deliberately withheld. The remaining gap is the bare expertId contract (validity, error behavior), which is modest but real given 0% schema coverage.

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 coverage is 0% and the single expertId parameter has no description, format hint, or source-of-truth (how to obtain a valid ID). The description only weakly compensates by scoping the ID to 'one approved expert'; it never says what an invalid or unapproved ID yields.

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 names a concrete resource (one expert) and enumerates returned content: public profile, per-minute rate, scheduling rules. The singular scope implicitly separates it from search_experts, but it is a noun phrase without a verb and never explicitly names the sibling it differs from (e.g. get_expert_availability, which also touches scheduling).

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?

'For one approved expert' implies this is a single-entity lookup rather than a search, giving implied routing versus search_experts. However, no explicit when-to-use, no when-not, no named alternative, and no note that get_expert_availability may be the better tool if only scheduling is needed.

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