transport_play_region

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

No annotations provided, so description carries full burden. Fails to disclose whether playback blocks until completion, affects the cursor position, stops existing playback, or handles edge cases (end < start). Only states the obvious action.

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?

Front-loaded purpose statement followed by Args section. Efficient at ~3 lines. The 'Args:' format is slightly informal but wastes no words. Every sentence 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?

Adequate for a simple 2-parameter tool with no output schema, covering basic operation and parameter semantics. However, lacks behavioral context expected for transport controls (side effects, playhead interaction, concurrency with recording) given zero annotation coverage.

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 has 0% description coverage (titles only). The description compensates by specifying both parameters and their units ('Start time in seconds', 'End time in seconds'), which is critical semantic information missing from the schema. Does not provide constraints (e.g., non-negative values, end > start).

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?

States 'Play a specific time region' with clear verb and resource. Distinguishes from generic transport_play by specifying 'specific time region', though it doesn't explicitly contrast with sibling tools.

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?

Provides no guidance on when to use this versus transport_play (which plays from cursor) or select_region (which only selects). No mention of prerequisites like having audio loaded or valid time ranges.

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