list_device_tier_configs

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

No annotations are provided, so the description carries the full burden. It discloses read-only behavior ('read-only here'), pagination defaults (10 default, 100 max), and the structure of returned entries. It does not mention potential errors or auth requirements, but for a read-only list operation this is reasonably transparent.

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 paragraph that front-loads the core action and then provides necessary details (pagination, read-only nature, sibling reference). All sentences contribute useful information, though it could be slightly more concise by splitting into a few short sentences. Still highly efficient.

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 list tool with 3 parameters and no output schema, this description is quite complete. It covers the purpose, default behavior, pagination, and how to handle the nextPageToken. It also tells the user where the full definition lives. It lacks explicit mention of response format details beyond the entry fields, but that is arguably covered by the entry description.

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 coverage is 100%, but the description adds valuable semantics beyond the schema: it specifies the default limit value, explains the purpose of page_token ('nextPageToken from a previous call'), and notes that package_name defaults to GOOGLE_PLAY_PACKAGE_NAME. This enriches the schema without redundancy.

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 explicitly states the action (list) and resource (device tier configs of an app), with a clear ordering clause ('newest first') and a one-sentence definition of what a device tier config is. It also distinguishes from the sibling get_device_tier_config by noting that this lists summaries while the get tool returns full definitions.

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?

It provides explicit usage context: when you need the full definition, use get_device_tier_config; creation is done elsewhere (Play Console or bundletool). It also explains pagination usage with page_token from nextPageToken, which directly guides invocation.

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