List Google Cloud Services

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

With no annotations, the description must convey behavioral traits. It describes the operation as 'List all available services' but does not disclose that results are paginated via pageSize/pageToken, nor does it explicitly state the read-only nature. This could mislead an agent into expecting a single full-list response.

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?

One sentence, front-loaded with the verb and resource, no filler. It is appropriately concise for a simple list operation.

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 simple list tool the description is adequate but not complete: it omits pagination behavior and the distinction from gcp-billing-list-skus. Since there is no output schema, the agent receives no hints about the shape or pagination of results beyond the parameter names.

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 schema already fully documents both parameters (pageSize, pageToken) with 100% coverage. The description adds no parameter-specific meaning, so it meets the baseline for schema-covered parameters.

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 uses the specific verb 'List' with the resource 'Google Cloud services' and adds the purpose 'for billing and cost analysis'. It is clear, though it does not explicitly contrast with siblings like gcp-billing-list-skus, so the differentiation is by object name rather than explicit wording.

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?

No guidance is provided about when to choose this tool over alternatives such as gcp-billing-list-skus or gcp-billing-service-breakdown. There are no exclusions, prerequisites, or context signals like 'use this when you need...'.

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