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effect

Add or remove a Strudel effect (e.g., lpf, delay) on the current session pattern. Specify action 'add' with effect name and params, or 'remove' to strip the last effect.

Instructions

Add or remove a Strudel effect on the current session pattern. action=add appends .<effect>(<params>). action=remove strips the last .<effect>(...) call from the pattern. Example: effect({ action: "add", effect: "lpf", params: "1000" }). For higher-level effect bundles (mood/energy/refine) use shape; for raw transforms use transform.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYesadd or remove the effect
effectYesEffect name (e.g. lpf, room, delay)
paramsNoEffect parameters (action=add only)
session_idNoOptional session ID (#108). Omit to use default session.
Behavior3/5

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

While no annotations are provided, the description discloses basic behavior (appending/stripping effect calls). However, it lacks details on side effects, error handling, or state changes beyond the pattern modification.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences plus an example. Front-loaded with purpose, no wasted words. Efficient and easy to parse.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema, the description implies the pattern is modified but doesn't specify return value or error conditions (e.g., removing a non-existing effect). Completeness is adequate but not thorough.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, but the description adds value by providing an example, listing effect examples (lpf, room, delay), and clarifying that params is only for action=add. This goes beyond the schema's static descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states the tool adds or removes a Strudel effect on the current session pattern. It specifies verbs 'add' and 'remove' and the resource 'pattern effect', and distinguishes from sibling tools 'shape' and 'transform'.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly explains when to use each action (add appends, remove strips) and provides an example. Also differentiates from 'shape' for higher-level effect bundles and 'transform' for raw transforms.

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

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