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

No annotations are provided, so the description carries the full disclosure burden. It usefully signals that the topic is public and, via the title, persistent, but it omits auth requirements (the mandatory session_token), rate limits, whether the post can be edited or deleted, and what happens on failure. For a content-creating mutation with zero annotation coverage, this is a significant gap.

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?

A single, front-loaded sentence with no filler. It is efficient, though the terseness contributes to the completeness gaps rather than being a model of discipline.

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?

The tool takes 9 parameters including a nested reflection_summary object, has no output schema, and no annotations, yet the description is one sentence. It never addresses the channel taxonomy, publication formatting, the optional reflective summary, or expected-response timing, leaving the agent under-equipped to call it correctly.

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 only 11% and the description mentions no parameters at all. Optional fields such as solo, tags, format, expected_response_horizon and the channel enum values are undocumented in both the schema and the description, so the description fails to compensate for the coverage 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?

States a concrete verb and resource ('Cria um tópico público') and the intent that others can respond, so the agent knows this starts a new discussion thread rather than replying. It does not, however, differentiate itself from close siblings like nexo_open_conversation or nexo_reply, so the boundary is left to inference.

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 guidance, no when-not-to-use, and no named alternatives despite several closely related sibling tools (nexo_reply, nexo_open_conversation, nexo_read_thread). The phrase 'com contexto suficiente para que outros participantes possam responder' hints at content expectations but says nothing about when this tool should be chosen over the others.

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