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

The description adds meaningful behavior beyond the annotations: it discloses that Markdown is converted to Apple Notes native formatting, and that no action occurs unless confirm=true. This is valuable because the confirm gate is a behavioral requirement an agent must know before invoking. The behavior is consistent with readOnlyHint=false and destructiveHint=false, so there is no contradiction.

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 compact and front-loaded with the core purpose. It includes only a short list of supported Markdown features and the crucial confirm requirement. It earns a 4 rather than 5 because the Markdown details duplicate the schema and could be trimmed, though nothing is truly wasteful.

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 creation tool with full schema coverage, an output schema, and clear annotations, the description covers the essential decision points: what the tool does, target system, formatting behavior, and execution gate. It does not explicitly discuss return values or failure behavior, but the existing output schema reduces the need for that.

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 the schema already documents all four parameters. The description mostly echoes schema content, such as Markdown support in body and the confirm default behavior, without adding new parameter-level meaning. Baseline 3 is appropriate because the schema carries the parameter-semantics load.

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: 'Creates a new note in Apple Notes.' This clearly distinguishes it from sibling tools like read_note, update_note, delete_note, and search_notes. Naming Apple Notes explicitly prevents confusion with other creation tools such as create_reminder or create_draft.

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 context is clear: this tool is for creating notes in Apple Notes, which is sufficient to route an agent to it versus read/update/delete/search siblings. It also gives an important usage rule: 'Requires confirm=true to execute.' However, it does not explicitly state when not to use it or name alternative tools, 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.