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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the returned-field inventory, which is useful behavioral context, but says nothing about pagination behavior or result ordering beyond what the schema already states. With annotations carrying the safety burden, a 3 is appropriate.

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?

A single front-loaded sentence: verb and resource first, then the field inventory and endpoint. Nothing is wasted, though the trailing 'GET /consultant/services' is somewhat redundant with the name and adds little for an agent.

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 read-only list tool with no output schema, the description usefully enumerates the fields returned (id, name, duration, group or 1-1, session types, SKU), which substitutes for the missing output schema. Annotations cover safety. Only the absence of guidance relative to sibling list tools leaves a small gap.

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%, including cursor semantics for before_id/after_id, the limit range, and the team_for enum values, so the schema does the heavy lifting. The description adds no parameter-level meaning. Baseline 3 is correct.

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 gives a specific verb and resource ('List the services (appointment types) the practice offers') and pre-empts ambiguity by clarifying that services are appointment types. It also enumerates the returned fields, so an agent knows exactly what this call yields. It does not explicitly distinguish itself from sibling list tools, keeping it short of a 5.

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 guidance on when to use this versus other list tools (e.g. list_practitioners, list_packages) or any prerequisite/precondition. The GET endpoint hint gives a technical anchor but no selection criteria, so usage must be inferred from the name alone.

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