Get appointments for a month

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

No annotations exist, so the description carries the full burden, and it delivers the key non-obvious behavior: multi-day events appear in every overlapping month and `day` can fall outside the requested month. That overlap caveat is genuinely useful and not derivable from the schema, though it says nothing about permissions, calendar scope, or result size.

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?

Very tight: the scope statement comes first, followed by the return shape and the multi-day caveat, with no filler sentences. Slightly compressed for the amount of information packed in, but every clause earns its place.

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?

With no output schema, the description correctly supplies the return field list and the tricky end_day/day semantics, which is exactly the gap a caller would otherwise hit. It omits permission/auth context and any pagination or volume expectation for a month-long query.

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% for the two required parameters, so the description must compensate; it hints at the semantics of the queried month ('the month asked for') but never defines `year` or `month` or clarifies month numbering. It adds only marginal meaning over the schema's integer type and 1-12 bounds.

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 the resource (appointments) and the scope (one month), so an agent can tell it fetches calendar entries rather than mutating them. It lacks an explicit verb and never names the sibling tools it is distinct from, but against siblings like create_appointment/update_appointment the read purpose is unambiguous.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as the create/update/delete appointment siblings. The agent must infer from the name alone that this is the retrieval tool for a given month.

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