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list_smime_info

Retrieve S/MIME encryption configurations for Gmail send-as aliases to manage email security settings.

Instructions

Lists S/MIME configs for the specified send-as alias

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sendAsEmailYesThe email address that appears in the 'From:' header

Implementation Reference

  • src/index.ts:1243-1254 (registration)
    Registration of the 'list_smime_info' tool, including input schema and handler function that uses the Gmail API to list S/MIME configurations for a given send-as email address.
    server.tool("list_smime_info",
      "Lists S/MIME configs for the specified send-as alias",
      {
        sendAsEmail: z.string().describe("The email address that appears in the 'From:' header")
      },
      async (params) => {
        return handleTool(config, async (gmail: gmail_v1.Gmail) => {
          const { data } = await gmail.users.settings.sendAs.smimeInfo.list({ userId: 'me', sendAsEmail: params.sendAsEmail })
          return formatResponse(data)
        })
      }
    )
  • Handler function for list_smime_info tool. It invokes handleTool which authenticates and calls the Gmail API endpoint gmail.users.settings.sendAs.smimeInfo.list.
    async (params) => {
      return handleTool(config, async (gmail: gmail_v1.Gmail) => {
        const { data } = await gmail.users.settings.sendAs.smimeInfo.list({ userId: 'me', sendAsEmail: params.sendAsEmail })
        return formatResponse(data)
      })
    }
  • Zod input schema for the list_smime_info tool, requiring a sendAsEmail string parameter.
    {
      sendAsEmail: z.string().describe("The email address that appears in the 'From:' header")
    },
  • Shared helper function handleTool used by all tools, including list_smime_info, to handle OAuth2 authentication, client creation, and API call execution with error handling.
    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

B3.3/5.0
Behavior2/5

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

With no annotations, the description carries full burden but only says 'lists'. It does not disclose read-only nature, required permissions, error behavior, or return format.

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?

Single sentence, no redundancy, perfectly concise for the information conveyed.

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?

Adequate for a simple list operation, but missing details like whether it returns all configs and any pagination. Could be improved by noting difference from get_smime_info.

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 schema already describes the parameter. The description adds no extra meaning beyond 'specified alias', so baseline 3 applies.

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 it lists S/MIME configs for a specified send-as alias, using a specific verb and resource. It distinguishes from siblings like get_smime_info (singular) and insert_smime_info (create).

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 such as get_smime_info, insert_smime_info, or delete_smime_info. The description does not mention exclusions or context.

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