ga4_account_summaries_list

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

Without annotations, the description carries the full burden. It correctly identifies the tool as read-only and provides a 'lightweight' hint about the response. However, it does not disclose potential rate limits, the exact structure of the account summary, or any other behavioral traits beyond what the schema already implies about pagination.

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 extremely concise, consisting of two sentences and a 'Read-only' label. It front-loads the main action and purpose, with no redundant information. Every sentence serves a clear function.

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?

Despite lacking an output schema, the description adequately explains the return value: account plus property summaries with IDs and display names. This is sufficient for an agent to understand the response. However, it could be slightly more explicit about the structure of the account part.

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 has 100% description coverage for its two parameters (maxPages, pageToken). The tool description does not add any additional meaning or context about these parameters, so it meets the baseline expectation without extra contribution.

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 tool lists GA4 account summaries accessible to the user, specifying the content (account + lightweight property summaries with ID and display name). It distinguishes itself as the best starting point for discovering accounts and properties, setting it apart from sibling tools like ga4_properties_list.

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 provides clear usage context by stating it is the 'best starting point to discover available GA4 accounts and properties.' It also marks the tool as read-only. However, it does not explicitly mention when not to use it or list alternative tools for more detailed property information.

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