Gemini Quota & Usage Limits

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

Annotations already declare readOnlyHint and openWorldHint, so safety and network access are covered. The description adds real value by enumerating the returned data and the plan enum (Pro/Ultra/Free), which substitutes for the missing output schema. It says nothing about authentication or session requirements, which matters for an open-world fetch against a logged-in web page.

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 front-loaded sentence with no filler, and the returned fields are listed compactly in one clause. The URL is slightly redundant but usefully anchors where the data comes from.

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?

With no output schema, the enumerated return fields are the right thing to include, and they are present. What is missing for an open-world web-scraping tool is any note about requiring a signed-in session, possible failure modes, or what an unauthenticated agent should expect.

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 takes zero parameters, so there is nothing for the description to disambiguate. Baseline for a no-parameter tool applies, and the description does not confuse matters by implying optional filters that do not exist.

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 verb and resource ('Check Gemini quota and usage limits') and names the source page plus the exact data points returned (usage percentage, reset time, weekly limit, plan). It is understandable without opening the schema. It does not, however, distinguish itself from the sibling gemini_status, which an agent could easily confuse it with.

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?

Usage is only implied: an agent can infer this is the tool for quota questions rather than for chat or status. There is no explicit when-to-use, when-not-to-use, or pointer to gemini_status as the alternative for service health checks.

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