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Linear MCP Server

linear_update_label

Modify an existing label in Linear's issue tracking system by updating its name, color, description, parent label, or archive status.

Instructions

Update an existing label in Linear

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
archivedNoWhether to archive the label
colorNoThe new color for the label in hex format (e.g. "#FF0000")
descriptionNoThe new description for the label
labelIdYesThe ID of the label to update
nameNoThe new name for the label
parentIdNoThe ID of a new parent label
Behavior2/5

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

With no annotations provided, the description carries full burden but only states the basic action ('Update an existing label'). It doesn't disclose behavioral traits like required permissions, whether updates are reversible, rate limits, error conditions, or what happens to unspecified fields (partial vs. full updates). For a mutation tool with zero annotation coverage, this is a significant gap.

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?

The description is a single, efficient sentence with zero wasted words. It's front-loaded with the core action and resource, making it easy to parse quickly. Every word earns its place.

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

Completeness2/5

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

For a mutation tool with no annotations and no output schema, the description is inadequate. It doesn't cover behavioral aspects (permissions, side effects), usage context, or return values. Given the complexity of updating a label with multiple fields and sibling tools available, more completeness is needed.

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 6 parameters. The description adds no parameter-specific information beyond what's in the schema (e.g., it doesn't explain relationships between parameters like parentId hierarchy or color format validation). Baseline 3 is appropriate when the schema does the heavy lifting.

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

Purpose4/5

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

The description clearly states the verb ('Update') and resource ('an existing label in Linear'), making the purpose unambiguous. It distinguishes from sibling tools like 'linear_create_label' (create vs. update) and 'linear_get_labels' (read vs. update), though it doesn't explicitly mention these distinctions in the description itself.

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

Usage Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives like 'linear_create_label' for new labels or 'linear_get_labels' for viewing labels. It also doesn't mention prerequisites (e.g., needing labelId) or contextual constraints, leaving usage entirely implicit.

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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