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

No annotations are provided, so the description carries the full burden. It explains each pattern's rhythmic behavior, MIDI octave range, velocity range, and default values. It does not mention side effects or authorization needs, but for a generative tool, it is sufficiently transparent.

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: purpose statement, context (harmonic trio), parameter definitions with examples, and multiple usage examples. It is slightly verbose but every sentence adds value, and the formatting aids readability.

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 no output schema and the generative nature, the description lacks explicit mention of return value (likely success/failure). It provides comprehensive input guidance but omits what the tool returns, which is a minor gap for completeness.

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%, but the description adds meaning for 6 of 8 parameters: pattern (with detailed pattern definitions), bars_per_chord, octave (with MIDI note reference), velocity (range and default), track_index, and progression. Two parameters (start_beat, unit_index) are not described, but the overall parameter semantics are well-enhanced.

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 states 'Create a bass line from a chord progression string' and distinguishes itself from siblings like create_bassline by detailing the harmonic trio (chord pads, arpeggiated progression, bass foundation). Examples further clarify the specific role.

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 clear context for when to use this tool—as part of the harmonic trio for bass foundation—and offers pattern recommendations with genre associations. It does not explicitly state when not to use, but the examples and pattern descriptions serve as adequate guidance.

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