mcp_opendaw_create_ostinato

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

With no annotations, the description carries the full burden of behavioral disclosure. It states the return value (total notes and pattern info) but does not disclose whether the operation is destructive, requires specific permissions, or has rate limits. Since it creates new content, it is likely nondestructive, but the lack of explicit behavioral details results in a score of 3.

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 well-structured: a definition of the output, usage context, then a parameter list with examples. It is somewhat lengthy but each sentence adds value. It front-loads the purpose. Could be slightly more concise, but overall efficient.

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 9 parameters, 3 required, and an output schema, the description covers the musical concept and key parameters. It does not detail behavior like placement or conflict resolution, but defaults and the return value provide enough context for correct invocation. The description is complete enough for typical use.

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 explain parameters. It provides clear explanations for required parameters (root, scale, pattern) with examples (e.g., '1 5 3 5' for pattern). It also describes optional parameters like repeats, octave, and velocity. However, it does not explain start_beat, unit_index, or track_index, which are likely technical but have defaults. Overall, good parameter explanation.

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 defines the tool's purpose: creating an ostinato, a repeating melodic/rhythmic pattern. It explains what an ostinato is and its musical context. The tool name and description align perfectly, and the description distinguishes this from other create_* tools by specifying the nature of the output.

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 provides context for when to use this tool: for short repeating patterns as a foundation layer, common in minimalism, electronic, and film music. This helps an agent decide. However, it does not explicitly mention alternative tools (e.g., create_ground_bass, create_passacaglia) or when not to use it, but the guidance is sufficient for most cases.

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