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deyikong

SendGrid MCP Server

by deyikong

Open Single Send Creator

open_single_send_creator

Launch the SendGrid single send creator to design and schedule email campaigns directly in your browser.

Instructions

Open SendGrid single send creator in browser

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The handler function that executes the tool logic, returning a message instructing the user to open the SendGrid single send creator URL in their browser.
    handler: async (): Promise<ToolResult> => {
      return {
        content: [
          {
            type: "text",
            text: "Please open this URL in your browser to create a new single send:\nhttps://mc.sendgrid.com/single-sends/new/selector/your-designs?view=raw",
          },
        ],
      };
    },
  • The tool's configuration, including title and description, defining its schema (no input parameters).
    config: {
      title: "Open Single Send Creator",
      description: "Open SendGrid single send creator in browser",
    },
  • Aggregation of all tools by spreading campaignTools (which includes open_single_send_creator) into the allTools export.
    export const allTools = {
      ...automationTools,
      ...campaignTools,
      ...contactTools,
      ...mailTools,
      ...miscTools,
      ...statsTools,
      ...templateTools,
    };
  • src/index.ts:21-23 (registration)
    Final MCP server registration loop that registers all tools from allTools, including open_single_send_creator.
    for (const [name, tool] of Object.entries(allTools)) {
      server.registerTool(name, tool.config as any, tool.handler as any);
    }
Behavior2/5

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

With no annotations, the description carries the full burden of behavioral disclosure. It states the tool opens something in a browser, implying a UI interaction, but doesn't clarify if this launches a new tab, requires user authentication, or has any side effects like navigation away from current context.

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, front-loading the key action and resource. It's appropriately sized for a simple tool with no parameters.

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?

For a tool with 0 parameters and no output schema, the description is minimally adequate. It explains what the tool does but lacks details on behavioral aspects (e.g., browser behavior, authentication needs) that would be helpful given the absence of annotations.

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 no parameter documentation is needed. The description doesn't add param details, which is appropriate, but it could hint at implicit context (e.g., browser state), though not required for a high score.

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 action ('Open'), the resource ('SendGrid single send creator'), and the method ('in browser'), making the purpose specific and unambiguous. It distinguishes itself from siblings like 'open_automation_creator' by specifying the exact resource type.

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 prerequisites (e.g., needing browser access) or compare it to similar tools like 'open_automation_creator' or 'open_single_send_stats', leaving usage context unclear.

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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