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

The readOnlyHint annotation already establishes this is a safe read. The description adds the underlying endpoint (GET /main/Practitioner/{id}), which is mild context, but says nothing about not-found behavior, permissions, or what happens with invalid ids. Moderate value beyond annotations.

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?

Two short sentences with no padding, and the verb/resource statement is front-loaded before the endpoint detail. Appropriately sized for a single-parameter lookup.

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 simple read-only single-id lookup with full schema coverage and a readOnlyHint annotation, the definition covers what an agent needs to call it. Output shape is unspecified but no output schema exists either, so the gap is modest rather than disqualifying.

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 id pattern and guidance are already documented in the schema; this sets the baseline at 3. The description's only extra semantic content is that the id may resolve to either a practitioner or an administrator record.

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 ('Fetch a practitioner or administrator by id') and adds the useful nuance that administrator records come from the same lookup. It does not explicitly name halaxy_list_practitioners as the sibling it complements, though the get-vs-list distinction is inferable from the name.

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 mention of the alternative list tool, and no stated prerequisites such as needing a valid id from a prior lookup. The only hint ('by id') is a restatement of the required parameter, and the 'from the matching list tool' cue lives in the schema rather than the description.

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