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 goes further by disclosing what the response contains (time zone, hostname, role, subscription state) and the underlying endpoint, which is genuinely useful given there is no output schema; it stops short of covering error/auth behavior.

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 short and front-loaded: the returned-resource summary leads, followed by the raw endpoint. The endpoint fragment is telegraphic and adds little for an agent, but nothing is wasted or buried.

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 single-resource read with one required id and no output schema, the description covers the resource identity and the returned fields, which is most of what an agent needs. It lacks any note on failure modes (e.g., unknown id) or how the domain relates to subsequent calls.

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?

There is one parameter with 100% schema description coverage, including a pattern, length bounds, and a pointer to where the id comes from. The description adds nothing beyond that for the id itself, so the 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?

The description states a specific verb+resource (fetch one Pirsch dashboard/domain by id) and enumerates the attributes returned (time zone, hostname, role, subscription state). It does not explicitly name the sibling it contrasts with (pirsch_list_domains), though the singular 'one ... by id' implicitly distinguishes it from a list operation.

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 explicit when-to-use/when-not statement or named alternative in the description text. The schema parameter note ('Get it from pirsch_list_domains') does imply the list-then-get workflow, so usage is inferable but not stated by the description itself.

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