fire_tv_play_uri

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

With no annotations provided, the description carries the full burden. It discloses that the URI must be allowlisted, the package must be installed, and that it verifies the operation. However, it does not mention side effects, error behavior, or permissions, leaving significant behavioral aspects undisclosed.

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 sentence that is front-loaded and contains no redundant information. Every word earns its place.

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?

The tool is simple, but with no annotations or output schema, the description should clarify the verification process and any return values. It also omits the meaning of transition_delay. It is adequate but leaves several questions unanswered.

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 coverage is 0%, so the description must compensate. It provides some meaning for 'uri' (allowlisted) and 'package' (explicit installed), but gives no guidance on the 'transition_delay' parameter, its units, or why it exists. This is insufficient for a three-parameter tool.

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 clearly specifies the action (open), the target (an allowlisted URI), and the scope (in one explicit installed package), with a verification step. This distinguishes it from siblings like fire_tv_launch (launching an app) and fire_tv_command (sending commands).

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 intended use is implied: use when you need to open a specific URI in a specific installed package. However, the description does not explicitly state when to use this tool over alternatives, nor does it provide exclusions or comparisons with sibling tools.

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