game_key_hold

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

The description mentions 'without auto-releasing', which partially discloses behavior, but it fails to specify whether the hold is blocking, how to end the hold, or what happens on overlapping inputs. With no annotations (destructiveHint, readOnlyHint) to supplement, more clarity is needed.

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, concise sentence that conveys the core functionality immediately. It avoids unnecessary detail and is front-loaded, making it efficient for an agent to parse.

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?

Given the low complexity (2 optional parameters, no output schema), the description covers the basic purpose but lacks details on side effects, return values, or how the hold interacts with the game environment. It is adequate but not comprehensive.

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 description coverage is 100%, providing descriptions for both 'key' and 'action'. The description does not add further meaning beyond the schema, such as precedence rules when both are provided or typical usage patterns, so a baseline score of 3 is appropriate.

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 'Hold a key down without auto-releasing' clearly states the action (hold) and the resource (key), and the 'without auto-releasing' differentiates it from sibling tools like game_key_press or game_key_release, making the purpose unambiguous.

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 implies usage for continuous key holding but does not explicitly state when to use this tool versus alternatives like game_key_press or game_key_release. No direct guidance on prerequisites or context is provided.

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