tabs

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

With no annotations, the description carries the full burden, and it falls short: it never states whether closing a tab is destructive, what happens when the last tab is closed, whether switching requires an index, or any permission/auth requirements. 'Optionally at a URL' is the only behavioral nuance offered.

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?

A single front-loaded sentence that enumerates the operations efficiently with no filler. It is slightly dense (a colon-list of four clauses in one line) but every clause earns its place by naming a distinct action.

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 stateful tool that can create and destroy tabs, with no annotations and no output schema, the description omits what 'list' returns, what 'new' returns, and how indices behave after a close. An agent would need to guess at return shape and post-close index semantics, leaving a real gap.

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 67% — url and index already have descriptions in the schema, and the action enum is self-documenting. The description's 'optionally at a URL' echoes the schema's url semantics without adding format or constraint detail, so the schema remains the primary source. Baseline 3 is appropriate.

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 gives a specific verb (manage) and resource (tabs) and enumerates the four supported operations — list, new, select, close — which map to the action enum. The 'of this pod only' scoping is a useful qualifier, but it never distinguishes this tool from the sibling pod_window, which an agent could reasonably confuse for tab handling.

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?

Listing the four actions gives implied usage for each, and 'of this pod only' sets a scope boundary. However, there is no explicit when-to-use guidance and no alternatives named — notably nothing tells the agent when to reach for pod_window versus tabs, or that the sibling 'select' is unrelated to the 'select' tab action here.

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