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BlZvi
by BlZvi

Get Custom Fields For Workspace

asana_get_custom_fields_for_workspace
Read-onlyIdempotent

List all custom field definitions in a workspace to discover field GIDs, names, types, and enum options before reading or writing custom field values on tasks.

Instructions

List all custom field definitions in a workspace. Returns gid, name, type, and enum_options for each field. Use this to discover available custom fields and their GIDs before reading or writing custom field values on tasks.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNoResults per page (1-100).
offsetNoPagination offset token from a previous response's next_page.offset.
workspaceNoThe GID of the workspace (numeric string, e.g. `'1234567890123'`). Get it from asana_list_workspaces. Can be omitted if ASANA_DEFAULT_WORKSPACE_GID is set.
opt_fieldsNoComma-separated extra fields to include. Useful values: `gid,name,type,description,enum_options,is_global_to_workspace,precision,format`. Default fields: gid, resource_type, name.
Behavior4/5

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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false. The description adds behavioral value by stating what fields are returned and framing it as a discovery step. It does not mention pagination behavior, but the schema covers limit/offset.

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, no filler. The first sentence states the core function and return fields; the second provides practical usage guidance. Every sentence earns its place.

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

Completeness5/5

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

For a simple read-only listing tool with rich schema annotations and no output schema, the description sufficiently explains purpose, return values, and why it should be invoked. No major gaps for an agent to misuse the tool.

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

Parameters3/5

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

Schema description coverage is 100%, so the schema fully documents all four parameters. The description reinforces the workspace concept and GID usage but adds no parameter-level meaning beyond the schema. Baseline 3 is appropriate.

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?

The description opens with 'List all custom field definitions in a workspace,' which is a specific verb+resource+scope combo. It also lists what is returned (gid, name, type, enum_options), clearly distinguishing this from sibling tools like asana_get_custom_field or custom field mutation tools.

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

Usage Guidelines4/5

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

Explicitly states when to use: 'Use this to discover available custom fields and their GIDs before reading or writing custom field values on tasks.' This gives clear task context, though it does not explicitly name alternatives or when-not-to-use cases.

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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