flow_open_characters

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool opens a page and lists characters, implying a read-only action, but it does not explicitly confirm it is read-only, mention any limitations, or describe what exactly 'list' returns (e.g., a formatted list, a visual UI, or a status message).

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 sentence that is precise and immediately states the primary actions and target resource. Every word earns its place, with no redundant or filler content, making it both concise and front-loaded.

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 tool with no parameters and no output schema, the description is moderately complete. It conveys the main purpose ('open page' and 'list characters') but leaves ambiguity about the exact output format or how the agent receives the character list. Given the absence of an output schema, a slightly more explicit description would improve completeness.

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 the schema confirms this. The description adds no parameter-specific information, but with no parameters to describe, the baseline of 4 applies. The description's mention of 'listing existing characters' gives context to what the tool does without needing parameter details.

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 opens the Google Flow Characters page and lists existing characters. It uses specific verbs ('open', 'list') and a resource ('Google Flow Characters page'), effectively distinguishing it from sibling tools like flow_create_character and flow_import_character.

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 implies the tool is used for viewing existing characters, but it does not explicitly state when to use it over alternatives or mention any prerequisites. There is no direct comparison with sibling tools such as flow_create_character or flow_import_character, so usage guidance is only implied.

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