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

Annotations only say destructiveHint=true; the description goes further by disclosing the downstream consequence (flows that search it will find nothing) and the confirmation loop ('May return needs_confirmation'), which is critical for 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?

Two tightly written sentences with the destruction scope front-loaded and the confirmation caveat last. The parenthetical about where the user can see dependent agents is slightly clunky but still earns its place.

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 3-param destructive tool with no output schema, the description covers blast radius, dependent-flow impact, and the confirmation flow. It never states irreversibility outright or clarifies the workspace-parameter interaction, which are the remaining gaps.

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 baseline is 3, but the description adds context for the approvalId round-trip by explaining that a needs_confirmation response can occur, and it reinforces the kbId provenance implicitly. Modest but genuine added value.

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 and resource ('Deletes a knowledge base') and immediately scopes the blast radius ('and everything in it'), which implicitly separates it from workbench_kb_document_delete. It does not name a sibling explicitly, so it stops short of the top mark.

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?

Gives a concrete precondition before acting: check which agents use the KB and tell the user before proposing deletion. That is real usage guidance, but no alternative tool or when-not-to-use condition is named.

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