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

With readOnlyHint=false and openWorldHint=true already declared, the description adds real context beyond the annotations: create publishes immediately with a public address, has no draft state, is free, and is capped per person. However, that cap is stated as 'teto de 8 por pessoa' in the description while the schema says 'Teto de 4 por pessoa' — a factual inconsistency that weakens trust in the behavioral claims.

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?

The definition is front-loaded: identity of the resource first, then the action list, then usage triggers, then the covered studios. Dense but each clause carries information. Minor redundancy between the description's action summary and the action enum's own descriptions keeps it from a 5.

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 five-action multiplexed tool with no output schema, the description covers what each action yields and how create behaves. What an agent still lacks is anything about failure modes (e.g. hitting the studio cap, invalid slug) and the 8-vs-4 quota conflict leaves one rule ambiguous.

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%, so the schema already documents every parameter, including which action each applies to. The description restates the action set but adds no syntax, format, or constraint details beyond the structured fields (and, for the quota, actively conflicts). Baseline 3 is correct here.

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 resource (the user's company studio plus the Sapiens studio/experiment catalog) and enumerates all five sub-actions with what each returns (mine = name/public address/brand/operator/team size; list = URL+status+tags+mcpReady; get = one slug; publishable_url = /articles/<slug>). It also names the covered studios, so an agent can distinguish it from siblings like sapiens_brand or sapiens_gallery without opening any schema.

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?

It gives explicit trigger phrases in both directions, in Portuguese: use when the user asks 'que estúdios existem' / 'qual o meu studio', or says 'quero abrir/fundar meu studio'. That is strong when-to-use guidance. It does not name alternatives or exclusions (e.g. that brand edits go to sapiens_brand rather than here), which keeps it short of a 5.

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