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

Beyond the annotations, the description discloses admin-only authorization, the index-reshifting side effect ('the links after it move up a number'), the return payload ('the whole new list'), an approval gate, and a per-call confirmation default that can be turned off. These are exactly the behavioral facts an agent needs before invoking a destructive tool.

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 destructive action and its effect are front-loaded and every sentence carries information. There is minor redundancy between the opening sentence and 'Removes one sidebar link', which keeps it from a perfect score.

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 two-parameter destructive tool with annotations but no output schema, the description covers authorization, side effects, return value, and the confirmation/approval flow. Nothing essential to correct invocation is missing.

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 100%, so both parameters are already documented, and the baseline is 3. The description adds only indirect meaning about 'number' being a positional index via the renumbering note; it does not explain the group identifier, bounds, or failure on an out-of-range index.

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 opens with a specific verb and resource ('Remove a link from the group's sidebar') and reinforces it with the UI analogue 'Settings, Links, Delete'. An agent can readily distinguish it from add_group_link and update_group_link without opening any 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?

'Admins only' and the note about the default per-call confirmation give clear operating context before the call is made. It does not explicitly name alternatives or exclusions (e.g., when to use update_group_link instead), so it stops short of a 5.

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