ga4 health check

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

Annotations already establish readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false, so the safety profile is well covered. The description adds valuable context by explicitly stating that it verifies credentials, accessible properties, and metadata access without exposing OAuth tokens, which is not present in the annotations.

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 description is a single dense sentence that front-loads the read-only nature and core checks. The OAuth token note is a valuable addition, and every phrase earns its place with no wasted words.

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 tool with one optional string parameter, rich annotations, and an output schema, the description provides the essential behavioral scope. It does not explain when to run the health check relative to sibling tools, but that gap is accounted for in usage guidelines, and the schema is sufficient for invoking the tool correctly.

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 input schema fully documents the single optional propertyId parameter with 100% description coverage. The description only indirectly references metadata/property access, which may relate to propertyId, but it adds no new parameter-level semantics beyond the schema, so a baseline score of 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 identifies the tool's purpose: it is a read-only GA4 health check that verifies configured credentials, accessible properties, and metadata/property access while avoiding exposure of OAuth tokens. This is more specific than the title alone, though it does not explicitly differentiate itself from sibling diagnostic 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 states what the tool does but gives no guidance on when to use it versus the many sibling diagnostic or reporting tools. There is no mention of prerequisites, sequencing, or exclusions, so an agent must infer usage from the name and context.

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