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

The description discloses that the tool initiates a process requiring customer authorization via message, aligning with openWorldHint=true. It does not contradict annotations (readOnlyHint=false, destructiveHint=false). Could be more explicit about the state after initiation, but provides useful behavioral context.

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?

Two sentences, no filler. Front-loaded with purpose, then usage guidance. Every word earns its place.

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?

Given the complex nested schema (covered by schema) and presence of output schema, the description provides sufficient context for onboarding. It notes the customer authorization step, which is key. Could mention async nature, but not critical.

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 parameters are well-documented. The description adds only a vague reference ('com os dados e acessos informados'), not enhancing parameter meaning. Baseline 3 is appropriate.

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 clearly states it initiates account opening for an Efí client with provided data and accesses. It specifies the verb 'inicia', resource 'conta Efí', and context 'onboarding'. It is distinct from siblings like 'create_account_certificate', which deals with certificates.

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?

The description advises use during onboarding and notes that the customer must authorize integration via message. While alternatives are not mentioned, no other account creation tool exists among siblings, so context is clear. Lacks explicit when-not-to-use but sufficient.

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