browser_mute_tab

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

With no annotations, the description carries the full burden: it does not say which tab is targeted when tab_id is omitted (presumably active), that 'muted' defaults to true, or whether the operation is idempotent. The only disclosure is the binary toggle itself.

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 short sentence that is front-loaded and waste-free, but its brevity comes at the cost of under-specification rather than genuine efficiency.

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 mutation tool with no annotations, no output schema, and 0% parameter coverage, the description should at minimum explain tab targeting and the default muted state. As written, an agent must guess both.

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 both parameters are undocumented structurally. The description maps loosely to the 'muted' boolean but says nothing about 'tab_id', including the important fact that a null value presumably means the active tab.

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?

States a specific verb pair ('mute or unmute') on a specific resource ('a tab'), so an agent knows exactly what effect to expect. It does not differentiate from any sibling, but no sibling overlaps this function, so the gap is minor.

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?

There is no guidance on when muting is appropriate, whether the target must be the active tab, or what happens if the tab is already in the requested state. For a simple toggle this is tolerable but still a clear gap.

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