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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds value beyond that by scoping the operation to the signed-in account and disclosing exactly what information is surfaced, which tells the agent this is a self-scoped, non-parameterized read.

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 sentence with no filler, front-loading the resource and following with the specific fields returned. Nothing can be removed without losing information.

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 zero-parameter, read-only tool with no output schema, the description is nearly sufficient: it enumerates the returned fields, which substitutes for the missing output schema. It stops short of describing return format or structure, but little more is needed at this complexity level.

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?

The tool takes zero parameters, so the baseline is 4. The description correctly signals that no input is needed by framing the target as 'the signed-in account', leaving nothing ambiguous about how to invoke it.

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 pairs a specific verb ('Shows') with a precise resource ('the signed-in Fledly account') and enumerates the fields returned (email, plan, plan limits, usage). It is clearly distinguishable from sibling tools like get_app or get_my_apps, which deal with apps rather than the account itself, though it never names them explicitly.

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 explicit when-to-use guidance, no stated prerequisites (e.g., must be authenticated), and no named alternatives. The intended use — checking plan and quota consumption — is implied by 'how much of them is in use' but left for the agent to infer.

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