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

Annotations only declare readOnlyHint and openWorldHint=false; the description adds real behavioral context: 10-per-page pagination, result grain switching between individual sessions and one representative session per location, and the presence of freshness/registration fields. It does not cover error handling or what an empty result means, so not 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?

Four front-loaded sentences, opening with purpose and scope before requirements and result shape. The final sentence on returned fields is dense but earns its place since there is no output schema; no filler or repetition.

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 13-parameter, no-output-schema search tool, the description covers the required location input, pagination, result grain, and the key fields returned. Gaps remain around how filtering combines (e.g., max_price_usd vs session price) and empty-result semantics, but nothing essential to calling it 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 coverage is 100%, so the baseline is 3 and the schema already documents each parameter's format and defaults. The description does exceed the schema in one meaningful way by explaining how start_date/end_date change result granularity (result_grain), but most other parameters are only restated.

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?

Names a specific verb (Search) and resource (kids' camp sessions) scoped to DC/MD/VA, plus the filterable dimensions. An agent can distinguish it from find_camp_by_name or get_camp_details by the multi-filter search framing, though no sibling is named explicitly to remove all doubt.

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 location precondition and the three accepted forms (ZIP, lat+lon, city+state), and explains the with-dates vs without-dates behavior plus a concrete use case for future_only=false. It stops short of naming when to prefer get_camp_details or get_sessions_and_availability instead.

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