list_official_packages

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is fully covered. The description adds the official-extension scope and examples, but no extra behavioral traits such as response format, pagination, or potential limitations. This is adequate but not rich.

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 compact sentences deliver the operation, examples, and usage guidance without filler. The main action is front-loaded and the supporting scope note is short and useful.

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 no-parameter, read-only listing tool with an output schema available, the description fully covers what the agent needs to decide whether to call it. The examples clarify the output style and the 'outside the core library' phrase resolves scope relative to sibling tools.

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 has zero parameters, so there is no parameter semantics for the description to explain. With no params, the baseline of 4 applies; the description cannot meaningfully add parameter detail.

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 states a specific verb and resource: 'Get a list of all official Flet extension packages.' It also gives concrete examples and explicitly scopes the tool to capabilities 'outside the core library,' which differentiates it from sibling tools targeting the core Flet API and controls.

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 description clearly says 'Use this to see what official extra capabilities Flet supports outside the core library,' providing explicit when-to-use context. It does not mention when not to use it or name alternative sibling tools, which keeps it from a 5.

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