Trello MCP Server

tre__create_card

Create a new Trello card with a name and description in a specified list to organize tasks and projects.

Instructions

Create a new card in a list

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "listId": "<listId>",
      "name": "<name>"
    },
    "name": "tre__create_card"
  }
}

Input Schema

Name	Required	Description
`listId`	Yes	The ID of the list to add the card to
`name`	Yes	The name of the card
`desc`	No	The description of the card

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.0.0Jan 26, 2026

TDQS

C2.9/5.0

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 of behavioral disclosure. It states the tool creates a new card, implying a write operation, but doesn't mention permissions required, whether the operation is idempotent, error handling, or what the response looks like (e.g., success confirmation or new card ID). This leaves significant gaps for a mutation tool.

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 no wasted words, clearly front-loading the core action and target. It's appropriately sized for the tool's complexity, making it easy to parse quickly.

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?

Given the tool's complexity as a mutation operation with no annotations and no output schema, the description is incomplete. It doesn't address behavioral aspects like permissions, response format, or error conditions, which are crucial for an AI agent to invoke it correctly in context with sibling tools.

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 already documents all three parameters (listId, name, desc) and their purposes. The description adds no additional parameter semantics beyond what's in the schema, such as format constraints or examples, meeting the baseline for high schema coverage.

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 action ('Create a new card') and target resource ('in a list'), providing specific verb+resource pairing. However, it doesn't differentiate from sibling tools like 'tre__update_card' which also modifies cards, leaving room for improvement in distinguishing operations.

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 is provided on when to use this tool versus alternatives like 'tre__update_card' for modifying existing cards or 'tre__get_cards' for viewing cards. The description lacks context about prerequisites, such as needing a valid list ID from 'tre__get_lists', or any exclusions.

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

Deploy Server