get_account_summaries

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

Annotations already declare readOnlyHint=true and destructiveHint=false, establishing the tool as safe and read-only. The description adds the return content (account names, property names, property IDs) but does not disclose additional behavioral traits like rate limits or data freshness. With annotations present, the description adds some value, but not richly. Score 3.

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?

Three sentences, each serving a purpose: the action and scope, usage guidance, and return values. Front-loaded with the key action. No redundant words. Score 5.

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?

Given the tool has an output schema (context signal), the description's mention of return fields (account names, property names, property IDs) is sufficient. It is complete for a straightforward list tool with no parameters. Score 5.

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?

No parameters exist, and schema description coverage is 100%. The description is not required to add parameter semantics. Baseline for zero parameters is 4, and the description does not detract. Score 4.

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 states the verb 'List' and the resource 'GA4 accounts and properties'. It is specific but does not explicitly differentiate from the sibling tool 'list_accounts', which could cause confusion. Score 4 for clear purpose but lacking sibling differentiation.

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?

Provides explicit usage context: 'Use this as the first step to discover which GA4 properties are available.' This is helpful for an agent. However, it does not mention when not to use it or alternatives. Score 4 for clear context but no exclusions.

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