get_song_grid_reference

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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description aligns by stating 'No song edits'. Beyond annotations, it adds behavioral context about what the tool reads (current tempo/meter), what it distinguishes (downbeat, meter beat starts, offbeats), and includes supplementary placements and tempo-interpretation details. No contradictions with annotations.

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, dense sentence that front-loads the core action ('Read a signature-aware one-bar step map') before enumerating details. It is efficient but includes some arguably non-essential elements like 'related MCP tool references' and 'non-binding 4/4 hip-hop, house, and trap placements', which, while informative, could be trimmed for sharper focus. Overall, it earns its length.

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 zero parameters, no output schema, and annotations covering read-only safety, the description is highly complete. It specifies the input source (current tempo/meter), the output type (one-bar step map), key structural elements (downbeat, meter beat starts, offbeats), and additional interpretative context (half-time vs tempo change, style placements). An agent would have a clear understanding of what the tool returns and its behavioral boundaries.

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?

The tool has zero parameters, so the schema is trivially fully covered. Per the baseline for 0-param tools, a 4 is appropriate. The description explains that the tool reads from 'current Live tempo and meter', which clarifies the implicit input source, though no explicit parameter documentation is needed.

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 states a specific verb ('Read') and a specific resource ('signature-aware one-bar step map') with precise rhythmic subdivisions. It clearly distinguishes itself from sibling tools like plan_drum_pattern by being a read-only reference, and the closing 'No song edits' reinforces its non-mutating 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 implies usage for reading rhythmic grid references based on current tempo/meter, and explicitly states 'No song edits' to signal a read-only context. However, it does not name alternative tools (e.g., plan_grid_envelope_pattern or plan_drum_pattern) or provide explicit when-to-use versus when-not-to-use guidance, leaving the agent to infer placement among siblings.

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