set_fx_parameters

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

With no annotations, the description carries the full burden and does meaningful work: it discloses atomicity ('a single undo step') and per-change failure semantics ('each change reports its result or its own error'). It does not state prerequisites (plugin must exist, position/name resolution rules) or whether a partial failure rolls back the whole batch.

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?

Two tightly packed sentences, zero filler. The atomic-batching behavior is front-loaded, and the error-reporting note follows as a compact second clause.

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?

For a no-annotation, no-output-schema mutation tool with a nested parameter object, the description covers the two most important unknowns: undo granularity and per-item error reporting. Remaining gaps (prerequisite that the FX exists, behavior on partial failure, return shape) are minor but real.

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 67%, above the 50% baseline, so the schema already documents 'parameter', 'value', 'display_value' and 'display_text'. The description adds nothing about these three alternative value representations or how they interact, leaving a real ambiguity (raw 0-1 vs display units vs display text) unexplained.

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?

States a specific verb+resource: setting multiple parameters of one plugin, with concrete examples (synth patch, compressor). It implicitly distinguishes itself from the singular sibling set_fx_parameter by emphasizing batching, but never names or contrasts that sibling explicitly, so the boundary is left to inference.

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?

Usage is implied by the examples and the 'single undo step' framing (use this when you want several changes applied together), but there is no explicit when-to-use/when-not or reference to set_fx_parameter for single edits. An agent can infer the batching case but must guess whether one change is acceptable.

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