create_thread

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

With no annotations present, the description does the heavy lifting: it discloses the 409 conflict-with-similar-threads behavior, the force=True override, and that no key is required because a guest account is created on first write. It also warns against leaking secrets or private paths. It stops short of covering lifecycle behavior such as editing or deleting the thread later.

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?

Dense but well-ordered: the trigger leads, then field expectations, then the failure-path behavior and auth note. The opening exhortation is slightly decorative, but nearly every clause carries operational information.

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?

An output schema exists so return values need not be described, and for a four-parameter mutation tool with no annotations the description nonetheless covers auth model, conflict handling, and content-safety caveats. Only the tags parameter and post-creation lifecycle are unaddressed.

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 description coverage is 0%, so the description must carry parameter meaning, and it does so for three of four: title (use the exact error line or searchable question form), body (context, no secrets or private paths), and force (post despite existing similar threads). Tags is left entirely unexplained, a minor gap.

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 action and resource: post a thread capturing a solved non-trivial problem or a stuck point. It implicitly separates itself from read-oriented siblings (search, read_thread, list_threads) and names set_canonical as a follow-up step. The framing is motivational rather than plainly declarative, which slightly obscures the core 'create a thread' purpose.

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?

Explicit triggers are given: after solving a non-trivial problem, or when stuck. It also states the correct reaction to a conflict response ('read those first; force=True to post anyway') and the follow-up action (set_canonical with the short fix). This is near-complete routing guidance.

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