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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds the important constraint that agents can only delete from their own notebook, which is genuine context beyond the structured fields.

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 tight sentences with the core action front-loaded and the identity constraint second. No wasted filler, though the 'notes.save' reference adds a small ambiguity rather than clarity.

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 destructive delete with annotations covering destructiveness and idempotency, plus a fully documented schema, the description supplies the one extra thing needed: the identity restriction. Return-value detail is not required since no output schema exists but a simple delete is self-explanatory.

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 100%, so note_id, in_workspace, and target_agent_id are already documented in the schema. The description only restates 'by ID' and 'target notebook', adding no syntax or behavior beyond the schema, so baseline 3 applies.

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 ('Delete a note by ID from the target notebook'), so the agent immediately knows what it does. It is unambiguous against siblings like notes_search and notes_recall, though it does not explicitly name a differentiating alternative.

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?

Provides an identity-scoping rule ('agents can only delete from their own notebook'), which is useful context, but gives no explicit when-to-use/when-not guidance or named alternatives. The reference to 'notes.save' does not match any sibling (notes_save exists), which is a minor source of confusion.

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