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MagnusNilsson

trello-mcp-server

trello_update_task

Update existing Trello tasks by changing title, description, status, priority, or due date, and move tasks between lists.

Instructions

Update an existing task with new information or move it to a different list

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
cardIdYesThe ID of the card to update
titleNoNew title for the task
descriptionNoUpdated description
statusNoNew status (maps to Trello lists)
priorityNoUpdated priority level
dueDateNoUpdated due date in ISO format
Behavior2/5

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

With no annotations provided, the description carries the full burden but only states what the tool does, not any behavioral traits like mutation, idempotency, or permissions. No side effects or results are disclosed.

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

Conciseness4/5

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

The description is a single concise sentence, front-loading the core action. It could be slightly more structured, but it is efficient with no wasted words.

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 complete schema and no output schema, the description is adequate for basic understanding but lacks details on partial updates, return values, or failure states. It does not fully compensate for the missing annotation context.

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 coverage is 100%, so baseline is 3. The description adds no additional meaning beyond the schema's own parameter descriptions, nor does it explain parameter relationships or formats.

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 clearly states the tool updates an existing task with new information or moves it to a different list. It uses a specific verb-resource pair and distinguishes from sibling tools like trello_create_task or trello_get_tasks.

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?

No guidance on when to use this tool versus alternatives. The description does not mention scenarios, exclusions, or when to prefer other sibling tools.

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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