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

No annotations are provided, so the description carries the full burden of behavioral disclosure. 'Cria' implies mutation, but there is no mention of permissions required, whether the category is visible to others, reversibility, or any side effects—only the bare creation act is stated.

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 short sentence with no wasted words. The description is front-loaded and efficient, though it could be slightly more specific about the resource type.

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 creation tool with no output schema, the description is minimally adequate but leaves the tab/category/folder ambiguity unresolved. It lacks guidance on what a successful response looks like and whether the created item is private to the user, which 'pessoal' only hints at.

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 100%, with the 'name' parameter documented as 'Nome da pasta, até 40 caracteres' (folder name, up to 40 characters). The description adds no extra parameter detail, and there is a terminology mismatch—the description calls it 'tab/categoria' while the schema says 'pasta' (folder)—which could confuse an agent. Baseline 3 is appropriate since the schema does the work.

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 clear verb ('Cria' = creates) and resource ('tab/categoria pessoal' = personal tab/category), but uses ambiguous terminology—'tab/categoria' conflates two concepts. It does not differentiate from sibling tools like create_group or create_guest, leaving the agent uncertain about the exact resource type.

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?

No guidance on when to use this tool versus alternatives such as create_group or create_guest. The description gives no context about use cases, prerequisites, or exclusions, so the agent has to infer applicability from the tool name alone.

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