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

Annotations already declare readOnlyHint=true, so the safety profile is covered; the description adds useful content beyond that by disclosing what the response contains (account memberships and roles) and pinning the identity to the token owner. It stops short of detailing auth failure behavior or that no arguments are accepted, which is minor for a read-only endpoint.

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 the purpose and returned contents front-loaded and the API endpoint appended as a reference. Nothing is repeated from the title and no sentence 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?

For a zero-argument, read-only lookup with no output schema, the description covers what the tool returns (profile plus memberships and roles) and whose profile it is, which is sufficient to call it correctly. Slightly more routing context relative to textus_get_account would make it complete.

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 correctly implies no identifying input is needed because the subject is derived from the API token, which is the only parameter-relevant fact an agent needs.

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 ("Get the profile") and narrows the scope to "the user who owns the API token, including account memberships and roles," which separates it from account-level siblings like textus_get_account and textus_list_account_users. It does not explicitly name those siblings, so differentiation is implied rather than routed.

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 phrase "user who owns the API token" implicitly tells the agent to use this for self-identity/current-user lookups, but there is no explicit when-to-use guidance, no stated exclusions, and no named alternative for looking up other users or accounts.

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