mset

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

No annotations are provided, so the description carries the full behavioral burden. It only states that the tool 'defines a sequence of states' without disclosing side effects, whether it overwrites existing settings, or how the sequence is applied. This is minimal disclosure for a command that mutates playback state.

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, front-loaded sentence with no filler. It is concise, though the verb 'defines' is slightly vague and no additional structure (such as usage context) is included; still, 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 has only one parameter, the schema fully describes it with examples, and an output schema exists, so the simple one-sentence description is largely adequate. It lacks behavioral detail and sibling differentiation, but given the low complexity, it covers the essentials.

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% and the specification parameter already includes examples ('1 x30' to hold, '1 -30' to sweep). The tool description adds no extra parameter-level 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 clear verb+resource ('Defines a sequence of states for movie playback'), which conveys the tool's core function. It is specific enough to distinguish from playback control siblings like mplay, mstop, frame, forward, and backward, though 'defines' is somewhat generic and doesn't explicitly name the movie-state artifact.

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 phrase 'for movie playback' implies the context of setting up movie states, but there is no explicit guidance on when to prefer this tool over related siblings such as morph_states, frame, or mplay. No exclusions or alternatives are mentioned.

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