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

The leading 'DESTRUCTIVE:' label matches destructiveHint=true but merely restates the annotation, adding no new behavioral detail. It does contribute the API mapping (POST /appointments) and the required-field set, but says nothing about permissions, conflict handling, or what happens to the schedule record afterward.

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 most important signal (destructive write) first. Slight redundancy in re-listing required parameters that the schema already marks as required keeps it from a 5.

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 create tool with no output schema, the definition covers the inputs and endpoint but omits anything about the returned appointment identifier, whether double-booking is rejected, or required scopes. Adequate but incomplete for a mutation on a scheduling system.

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 schema already documents all 8 parameters including the ISO datetime format and duration-in-minutes semantics. The description's restatement of the five required fields adds no meaning beyond the schema; baseline 3 applies.

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 (creates) and resource (a new appointment on the schedule), which cleanly separates it from the cluster of list_*/get_* siblings. An agent can identify the tool's function and its write nature without opening the schema.

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?

The description enumerates the prerequisites (doctor, patient, office, scheduled_time, duration), which implies when the tool is callable, but it never states when to use this over alternatives or what conditions should block a call (e.g., scheduling conflicts, missing patient). Usage is implied rather than guided.

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