Manage tabs

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

Annotations already indicate the tool is not read-only, is destructive, and is not open-world. The description adds useful behavioral context by clarifying that closing a tab does not discard unsaved work without asking the user, directly addressing the destructive action's safety behavior.

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 no wasted words. The parenthetical about closing tabs earns its place because it adds safety context.

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 three-action tool with annotations and no output schema, the description covers the action set and close behavior but omits tabId semantics. An agent still lacks explicit guidance on supplying the tab identifier for switch and close.

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 0%, so the description must carry parameter meaning. It effectively maps the action enum values to new, switch, and close, but it never explains the tabId parameter or whether tabId is required for switch/close, leaving a meaningful gap.

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 names three specific operations on a concrete resource: opening a new tab, switching tabs, and closing tabs. The tab-management domain is clearly distinct from the sibling drawing/editing tools, so an agent can identify the tool's role without opening the schema.

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 how the action parameter selects among new, switch, and close, but it does not explicitly say when to use this tool versus alternatives, nor does it state prerequisites or exclusions. Usage is inferable from the action verbs, but the guidance is only minimum viable.

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