rename_firefox_tab_group

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

With no annotations, the description carries the full burden of behavioral disclosure. It adds key behaviors: 'verify the result' and 'fails if the new title already exists in the window.' This goes beyond what the name alone implies, although it does not cover all nuances like permission requirements or return value structure, which are not provided elsewhere.

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, front-loaded sentence with the verb and object first. It includes essential details—verification and failure condition—without any filler, making it highly concise and well-structured.

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 3 parameters and no output schema, the description covers the main operation, verification, and failure scenario. It does not explicitly discuss windowId handling, but the schema covers that, and the mention of 'window' in the failure condition provides a hint. Overall, it is mostly complete for the tool's simplicity.

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 description coverage is 100%, so the baseline is 3. The description reinforces the exactness of title matching ('exactly named', 'exact title') and introduces the duplicate-title failure condition, which adds slight context to newTitle. However, the schema already describes each parameter's purpose, so the value added is marginal.

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's function: 'Rename one exactly named Firefox group to a new exact title' using a specific verb and resource. It also distinguishes itself from sibling tools like create_firefox_tab_group and set_firefox_tab_group_color by focusing on renaming, making its purpose unambiguous.

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 context for when to use the tool (renaming a Firefox tab group with an exact title match), including a notable failure condition when the new title already exists. It does not explicitly mention alternatives or when not to use it, but the context is sufficiently clear without exclusions.

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