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

The annotations already establish readOnly, idempotent and non-destructive behavior, so the description's job is additive — and it does add the authentication requirement and the caveat that fields are only present 'as available in the user's app', warning the agent that some of the listed fields may be absent. It does not describe behavior on an invalid or foreign result_id, which is the remaining gap.

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, zero filler: the returned content is front-loaded, then the identifier source and the auth prerequisite. Every clause carries information an agent needs before calling.

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?

With no output schema, the description compensates well by enumerating the returned fields and flagging their optionality. Auth is stated and the id source is stated; the only missing piece is not-found/invalid-id behavior for a read-by-id tool.

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% and the single parameter's schema text already says where result_id comes from. The description repeats that provenance rather than adding format, length or validity constraints, so the baseline of 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?

The description names a specific resource ('one past assessment from the user's account') and enumerates exactly what it carries: likely problem, severity, symptoms, causes and care steps. That content profile separates it cleanly from get_plant (plant record) and get_guide (care guide) without needing to open any schema.

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?

It tells the agent precisely where the required identifier comes from ('a result_id from list_my_plants or get_plant'), which is the key routing instruction for a by-id lookup, and adds a precondition ('Requires the user's Leafsight sign-in'). It stops short of explicit exclusions, e.g. whether a missing or unowned result_id errors versus returns empty.

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