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deyikong

SendGrid MCP Server

by deyikong

Open Segment Creator

open_segment_creator

Create targeted email segments in SendGrid by opening the segment creator interface in your browser for precise audience grouping.

Instructions

Open SendGrid segment creator in browser

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The handler function that executes the tool logic by returning a message with the URL to the SendGrid segment creator interface.
    handler: async (): Promise<ToolResult> => {
      return {
        content: [
          {
            type: "text",
            text: "Please open this URL in your browser to create a new segment:\nhttps://mc.sendgrid.com/contacts/segments/create",
          },
        ],
      };
    },
  • Tool configuration including title and description. No input schema as the tool takes no parameters.
    config: {
      title: "Open Segment Creator",
      description: "Open SendGrid segment creator in browser",
    },
  • src/index.ts:21-23 (registration)
    Registration of all tools to the MCP server, including open_segment_creator via allTools.
    for (const [name, tool] of Object.entries(allTools)) {
      server.registerTool(name, tool.config as any, tool.handler as any);
    }
  • Aggregation of all tool sets into allTools, including contactTools which defines open_segment_creator.
    export const allTools = {
      ...automationTools,
      ...campaignTools,
      ...contactTools,
      ...mailTools,
      ...miscTools,
      ...statsTools,
      ...templateTools,
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It states the tool opens something in a browser, implying it's a UI-launching action, but doesn't disclose behavioral traits such as whether it requires user interaction, opens a new tab/window, handles authentication, or what happens if the browser is unavailable. For a tool with zero annotation coverage, this leaves significant gaps in understanding its operation.

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 that front-loads the core action ('open') and target. There is zero waste or redundancy, making it highly concise and well-structured for quick understanding.

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 the tool's simplicity (0 parameters, no output schema, no annotations), the description is complete enough to convey the basic purpose. However, it lacks context on behavioral aspects like browser interaction or integration with other tools, which could be helpful for an agent. It meets the minimum viable standard but has clear gaps in usage and transparency.

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?

The tool has 0 parameters, and schema description coverage is 100%, so there are no parameters to document. The description doesn't need to add parameter semantics, and it doesn't incorrectly imply any parameters. A baseline of 4 is appropriate as it avoids confusion and aligns with the empty schema.

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 ('open') and target ('SendGrid segment creator'), specifying it opens in a browser. It distinguishes from siblings like 'create_segment' (which likely creates programmatically) and other 'open_' tools that target different SendGrid components. However, it doesn't explicitly contrast with 'create_segment' or explain what a 'segment creator' is, keeping it from a perfect score.

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. It doesn't mention when to open the segment creator in the browser (e.g., for manual UI-based creation) versus using programmatic tools like 'create_segment', nor does it specify prerequisites or exclusions. The description is purely functional without contextual advice.

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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