threads_profile_topics

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

With no annotations, the description carries the burden. It usefully discloses that only public profiles are covered, that every topic tag is returned with numeric id and name, and that community topics include metadata. However, it does not state read-only behavior, auth requirements, pagination, or error handling.

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?

Front-loads the purpose and keeps the description to two compact sentences with no obvious fluff. The return-value and downstream-use details are useful, though the final sentence about community metadata is somewhat specialized.

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 one-parameter read tool with no output schema and no annotations, the description is nearly complete: it explains what is returned, the key fields, the public-profile limitation, and a downstream use. It leaves minor operational details unstated, such as pagination and error cases.

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 schema already documents the single username parameter at 100% coverage. The description adds meaning by specifying that the profile must be public, which constrains how the username parameter can be used, though it does not add username format details.

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: 'Discover public topic tags on a Threads profile' and 'Returns every topic tag listed on a public profile.' It distinguishes this from search-oriented siblings by tying the result to a profile and by noting the returned name can be passed as q to /threads/search/topics.

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?

Gives clear context for when to use it: to obtain topic tags for a known Threads profile. It also hints at a downstream workflow by saying the canonical name can be passed as q to /threads/search/topics, but it does not explicitly compare against or exclude alternatives such as threads_topic_search.

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