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

Annotations already declare the mutation profile (readOnlyHint=false, idempotentHint=false, destructiveHint=false), so the bar is lower. The description adds genuinely useful context beyond them: it returns the new entry with a link, photos are attached via that link, and an account is required. It does not say what happens on repeated calls despite non-idempotency.

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 sentences, front-loaded with the action and resource, with the return format and account requirement appended. No filler, though the single dense colon-list sentence packs several ideas together.

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 16-parameter mutation tool with no output schema, the description usefully covers purpose, return value, photo-link workflow, and the auth prerequisite. It does not clarify that all parameters are optional or how blank/omitted fields behave, which is a minor gap given the tool's complexity.

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 16 parameters are documented in the schema and the baseline is 3. The description's phrase 'the recipe figures, how it went and what to try next time' loosely maps to the hydration/salt/starter/temperature groups, notes/rating, and next_time_notes, but adds no syntax or default detail beyond the schema.

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 gives a specific verb and resource ('Add a bake to the baker's Loafy bake journal') and enumerates the content scope (what was baked and when, recipe figures, outcome, next steps). An agent can distinguish it from list_my_bakes or plan_sourdough_bake, though it never names the closest sibling (update_bake) to draw a hard boundary.

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?

Usage is implied by 'Add a bake to the journal,' and one prerequisite is stated ('Needs the baker's Loafy account'). However, there is no explicit guidance on when to use this versus update_bake (editing an existing entry) or plan_sourdough_bake, leaving the agent to infer the boundary.

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