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

The annotations already declare read-only, idempotent, non-destructive, and non-open-world behavior. The description adds useful operational context: this is a first-call account overview, it includes action prices and daily limits, and the zero-counter stop rule prevents retry loops.

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 compact and front-loads the returned contents before the call-first and limit rule. The telegraphic list style is efficient and every phrase contributes useful selection or usage information.

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 account overview without an output schema, the description covers the returned data and the key rate-limit behavior. It could clarify how this differs from me or my_profile, but it is sufficient for correct selection and invocation.

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?

With zero parameters, the schema is trivial and the baseline score is 4. The description does not need to explain input semantics, though its note that the first saved niche is primary clarifies returned ordering rather than input behavior.

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 enumerates the exact account payload: plan, key scopes, credits with action prices, today's limits, saved niches, and account link. The resource is clear, but it does not explicitly distinguish itself from overlapping siblings such as me, my_profile, credit_history, or niches_list.

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 explicitly says to call it first and explains that a counter at zero means stop rather than retry. It does not name alternatives for narrower account subresources like credit_history or niches_list, so the when-to-use guidance is strong but not complete.

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