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 genuinely useful behavior beyond that: the response is a bare array from Trumpia that gets wrapped, and the exact response shape is disclosed. It does not cover rate limits or auth, which keeps it from a 5.

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 with no filler, and the wrapping caveat is included compactly. It leads with the return shape rather than the action, which is slightly less front-loaded than ideal, but nothing is wasted.

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?

There is no output schema, so the description carries the burden of describing the return value — and it does, specifying the wrapper object and the per-item fields (org_name_id, name, default). For a zero-parameter read tool with annotations covering safety, this is nearly complete; only auth or pagination context is absent.

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?

The tool takes zero parameters, so the baseline is 4. The description still adds meaning by explaining that the returned org_name_id is the value used as org_name_id on messages, giving the identifier a concrete role.

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 and resource ('Registered organization names') and identifies the endpoint (GET /orgname), so an agent knows exactly what it retrieves. It does not explicitly distinguish itself from sibling list tools such as trumpia_list_lists or trumpia_list_custom_fields, so it stops 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?

Usage is implied rather than stated: it hints the returned id 'can be set as org_name_id on messages', which suggests a downstream use case. There is no explicit when-to-use guidance, no prerequisites, and no named alternative among the many sibling list tools.

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