ga4_account_summaries

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

The description states it lists accounts and properties, which is a read operation. With no annotations provided, the description carries the full burden. It does not disclose potential limitations (e.g., permissions required, rate limits, or data freshness). Adequate but not comprehensive.

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, well-structured sentence that front-loads the purpose ('GA4 Admin:') and includes all necessary information 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?

The tool is simple with no parameters and no output schema. The description fully explains what the tool returns and why to use it, making it complete for its complexity.

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 has zero parameters and schema_description_coverage is trivially 100%. The description adds no parameter information because none is needed, but it explains the output (numeric id) beyond the schema.

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 a specific verb ('list') and resource ('accounts + properties'), clearly states the output includes the numeric id, and provides a distinct purpose ('discover GA4_PROPERTY_ID'). It differentiates itself from sibling tools that require a property ID.

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 explicitly says to use this tool to discover the GA4_PROPERTY_ID, which implies it should be used before other GA4 tools that need that ID. However, it does not mention when not to use it or provide direct alternatives.

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