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get_send_as

Retrieve a specific send-as alias configuration from Gmail to manage email sending identities and verify account settings.

Instructions

Gets the specified send-as alias

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sendAsEmailYesThe send-as alias to be retrieved

Implementation Reference

  • Handler function that wraps the Gmail API call to retrieve the specified send-as alias using the shared handleTool utility.
    async (params) => {
      return handleTool(config, async (gmail: gmail_v1.Gmail) => {
        const { data } = await gmail.users.settings.sendAs.get({ userId: 'me', sendAsEmail: params.sendAsEmail })
        return formatResponse(data)
      })
    }
  • Input schema defining the required 'sendAsEmail' parameter for the get_send_as tool.
    {
      sendAsEmail: z.string().describe("The send-as alias to be retrieved")
    },
  • src/index.ts:1125-1135 (registration)
    MCP tool registration for 'get_send_as', including description, input schema, and handler function.
    server.tool("get_send_as",
      "Gets the specified send-as alias",
      {
        sendAsEmail: z.string().describe("The send-as alias to be retrieved")
      },
      async (params) => {
        return handleTool(config, async (gmail: gmail_v1.Gmail) => {
          const { data } = await gmail.users.settings.sendAs.get({ userId: 'me', sendAsEmail: params.sendAsEmail })
          return formatResponse(data)
        })
      }
  • Shared helper function used by get_send_as (and other tools) to handle authentication, client creation, and error handling before executing the Gmail API call.
    const handleTool = async (queryConfig: Record<string, any> | undefined, apiCall: (gmail: gmail_v1.Gmail) => Promise<any>) => {
      try {
        const oauth2Client = queryConfig ? createOAuth2Client(queryConfig) : defaultOAuth2Client
        if (!oauth2Client) throw new Error('OAuth2 client could not be created, please check your credentials')
    
        const credentialsAreValid = await validateCredentials(oauth2Client)
        if (!credentialsAreValid) throw new Error('OAuth2 credentials are invalid, please re-authenticate')
    
        const gmailClient = queryConfig ? google.gmail({ version: 'v1', auth: oauth2Client }) : defaultGmailClient
        if (!gmailClient) throw new Error('Gmail client could not be created, please check your credentials')
    
        const result = await apiCall(gmailClient)
        return result
      } catch (error: any) {
        return `Tool execution failed: ${error.message}`
      }
    }

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv1.0.0
    • addedInput schema / $schema
      Added value: +"http://json-schema.org/draft-07/schema#"
    • addedInput schema / additionalProperties
      Added value: +false
  2. First observed

TDQS

A3.5/5.0
Behavior3/5

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

The description implies a read-only operation through 'Gets', but with no annotations provided, it does not disclose additional traits like required permissions or side effects. Adequate for a simple getter, but minimal.

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?

Extremely concise: one sentence of 7 words with no filler. All text is relevant to the tool's function.

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 (one required parameter, no output schema), the description is adequate but does not explain what is returned or the need for the alias to exist. Minor gaps for a complete picture.

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%, and the description adds only 'to be retrieved', which echoes the schema description. No extra meaning beyond the schema, so baseline 3.

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 'Gets the specified send-as alias' uses a specific verb (Gets) and resource (send-as alias), clearly distinguishing it from sibling tools like list_send_as or create_send_as.

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 vs alternatives such as list_send_as or verify_send_as. The description lacks context for tool selection.

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