flix_get_messages

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

No annotations are provided, so the description bears full responsibility for disclosing behavior. 'Get message history' implies a read operation, but it doesn't state whether the call is read-only, whether it affects read/unread status, or what the response structure is. This is a significant transparency 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?

The description is a single short sentence with no filler words, making it highly concise. However, the brevity comes at the cost of missing key information, so it scores slightly lower than a perfect 5.

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 tool with two optional parameters and no output schema, the description must compensate by explaining the context. It fails to mention what constitutes message history, how it relates to device pairing or file transfers, or what the expected return format is. This makes it inadequate for an agent to invoke confidently.

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 input schema already provides descriptions for both parameters (deviceId and unreadOnly), achieving 100% coverage. The description adds no extra parameter semantics, so the baseline score 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 uses a specific verb ('Get') and resource ('message history'), clearly indicating the tool retrieves message history. It distinguishes from siblings like flix_send_text or flix_get_clipboard because none of them retrieve message history. However, it doesn't elaborate on the type of messages, so it is clear but basic.

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 offers no guidance on when to use this tool or how it relates to alternatives. No mention of prerequisites, use cases, or exclusions. With no annotation context, an agent would need to infer the use case from the name and schema.

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