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

readOnlyHint=true already declares the safety profile, so the description needn't restate it. It does add value with the filter-combination logic and the next_page->page pagination contract. It omits default page size behavior (only in schema), sort order, and whether inactive schedules are included by default — a notable gap for a list tool.

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 short sentences, front-loaded with the purpose and ending with the concrete pagination mechanic. The trailing 'GET /main/Schedule.' is mostly redundant with the readOnly annotation and could be dropped, but it costs little.

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 7-param, fully-documented, annotation-covered list tool with no output schema, the description covers purpose, filter semantics and pagination. The remaining gap is return-shape and default-inclusion behavior for inactive schedules, which an agent calling this cold would want.

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. The only semantic addition is 'Filters combine with AND', which is genuinely useful cross-parameter behavior not expressible in the schema. Nothing is said about the meaning or trade-offs of 'active', 'include', or 'actor' beyond what the schema already documents.

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 and resource ('List or search schedules') and goes further by defining what a schedule is ('containers of bookable time slots per practitioner'). Sibling tools like halaxy_get_schedule and halaxy_list_slots are never mentioned, so the agent gets no help distinguishing list vs get vs slot enumeration.

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?

'List or search' implies free-text/filter usage and 'Filters combine with AND' is a real usability hint. But there is no statement of when to prefer this over halaxy_get_schedule (single fetch) or halaxy_find_available_appointments (availability lookup), which is exactly the ambiguity an agent faces here.

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