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

With no annotations, the description carries the full behavioral burden, and for a write/mutation tool it discloses almost nothing: no auth requirements, no mention of whether entries are permanent or editable, no rate limits, and no effect on cache or agent state. The only behavioral content is the note-vs-DNF choice, which the schema already encodes.

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?

A single 11-word sentence with no filler, and the write action is front-loaded. It is efficient but so terse that it reads more like a label than a useful instruction.

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 three-required-parameter mutation with zero annotations and no output schema, the description omits prerequisites, error/edge behavior (e.g. unknown code, over-length text), and any notion of what the log entry affects. The schema covers parameters well, but the description leaves the operational context thin.

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 all three parameters (code, text, type) are already documented, and the 500-character limit and 'note | dnf' enum values live in the schema. The description adds no syntax, format, or validation detail beyond restating the note/DNF idea, 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 concrete verb ('Write') and resolves the resource precisely: a note or DNF entry in a cache logbook. An agent can distinguish it from write_post, sign_guestbook, or reply by resource type. It stops short of explicitly naming a sibling, so it is clear but not fully differentiated.

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?

There is no when-to-use guidance, no prerequisites (e.g. whether the cache must exist or be yours), and no indication of when a log note is preferred over attempt_cache or other write tools. The note/dnf distinction is left to the caller to infer.

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