debugger_targets

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

No annotations are provided, so the description must carry behavioral disclosure. It does so by clarifying the operation is a read-only listing, the scope includes hidden CDP targets, and the tool works even with zero tabs open. It does not explain session_id effects, but output schema existence reduces the need to describe return values.

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 two short sentences, with the core verb and resource front-loaded. Every phrase earns its place: the target scope, the excluded alternative, and the no-tabs capability are all conveyed without repetition or filler.

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 low-complexity listing tool with an output schema, the description covers the main behavior and a key edge case. However, it leaves the optional session_id parameter unexplained and does not clarify how this relates to the sibling list_all_tabs tool, which creates a meaningful gap for correct invocation.

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% and the description adds nothing about the optional session_id parameter. The parameter name and title give some hint, but the description does not compensate for the missing schema documentation, leaving an agent to guess what session_id means and when to provide it.

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 uses a specific verb ('List') and resource ('every CDP-attachable target'), and goes further by naming examples (service workers, extension background pages). It also explicitly distinguishes itself from list_tabs, so an agent can immediately understand what unique capability this tool provides.

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 gives clear context for when this tool is valuable: when targets like service workers and extension background pages are needed, and when no tabs are open. It names list_tabs as the alternative that misses these targets, though it does not explicitly discuss exclusions or compare against list_all_tabs.

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