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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds what data is returned (entity, plan, date, compact lists) but does not disclose exact list limits or response shape details. This adds moderate context without contradiction.

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 tightly written sentences: the first lists the returned contents, the second gives the usage instruction. No filler words, and the key information is front-loaded.

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 zero-parameter, read-only context tool with no output schema, the description provides the essential payload contents (entity, plan, timezone date, compact id↔name lists). It lacks exact response fields or size limits, but the tool is simple enough that this is a minor gap.

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?

The tool has zero parameters and an empty input schema, so no parameter documentation is necessary. Baseline of 4 for zero-parameter tools is appropriate; the description correctly focuses on return behavior instead.

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 very specific composite purpose: return connected entity, plan, today's date in the user's timezone, and compact id↔name lists of accounts, cards, and categories in one call. This clearly distinguishes it from the list_* siblings, which are individual listing tools.

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 gives explicit guidance to call it at the beginning ('Chame no início') to avoid multiple list_* calls, directly naming the alternative tool family. It could add a note about when not to use it, but the placement guidance is clear.

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