ga4 get channel groups

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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true, and destructiveHint=false, and the description's 'List' aligns with these. The description adds no extra behavioral detail such as pagination, authorization requirements, or scope limitations, but because the annotations already cover the safety profile, this is acceptable.

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 one clean, front-loaded sentence with no filler. It states the verb and object immediately and earns every word.

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 read-only tool with one parameter, full output schema, and strong annotations, the definition is largely sufficient to call it correctly. A brief pointer to related lookup tools would improve it, but that gap is already captured under usage_guidelines.

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?

Schema description coverage is 100%, so propertyId is already fully documented in the input schema. The description's 'for a GA4 property' adds no information beyond the schema, so it does not exceed the baseline for a fully described single-parameter tool.

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 names a specific resource ('custom channel groups'), a clear verb ('List'), and a scope ('defined for a GA4 property'). It does not explicitly differentiate from siblings like ga4_get_custom_definitions or ga4_get_metadata, so the agent must infer the boundary.

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 on when to use this tool versus alternatives such as ga4_get_custom_definitions or ga4_get_property_configuration. The only implicit usage context is the phrase 'defined for a GA4 property,' which is not enough to route an agent deciding between similar lookup tools.

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