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billyfranklim1

mcp-evolution

Update Group Setting

update_group_setting

Update WhatsApp group announcement and lock settings. Choose announcement mode for admin-only messaging or lock group info editing.

Instructions

Update group settings (announcement mode, locked) via the pinned instance.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
groupJidYesGroup JID (e.g. 120363000000000000@g.us)
actionYesannouncement: only admins can send; not_announcement: all can send; locked/unlocked: group info edit

Implementation Reference

  • The handler function that registers and implements the 'update_group_setting' tool. It makes a POST request to /group/updateSetting/{instanceName} with groupJid and action parameters.
    export function registerUpdateGroupSetting(server: McpServer, client: EvolutionClient): void {
      server.registerTool(
        "update_group_setting",
        {
          title: "Update Group Setting",
          description: "Update group settings (announcement mode, locked) via the pinned instance.",
          inputSchema: schema,
        },
        async (args) => {
          try {
            const data = await client.post(
              `/group/updateSetting/${client.instanceName}?groupJid=${encodeURIComponent(args.groupJid)}`,
              { action: args.action }
            );
            return { content: [{ type: "text" as const, text: JSON.stringify(data, null, 2) }] };
          } catch (e) {
            if (e instanceof McpError) return { isError: true, content: [{ type: "text" as const, text: e.message }] };
            throw e;
          }
        }
      );
    }
  • Input schema for the tool: requires groupJid (string) and action (enum: announcement, not_announcement, locked, unlocked).
    const schema = {
      groupJid: z.string().min(1).describe("Group JID (e.g. 120363000000000000@g.us)"),
      action: z.enum(["announcement", "not_announcement", "locked", "unlocked"])
        .describe("announcement: only admins can send; not_announcement: all can send; locked/unlocked: group info edit"),
    };
  • Import of the registerUpdateGroupSetting function from the update-group-setting module.
    import { registerUpdateGroupSetting } from "./update-group-setting.js";
  • Registration call that registers the tool with the MCP server and Evolution client.
    registerUpdateGroupSetting(server, client);
Behavior2/5

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

No annotations provided; description only says 'update' without disclosing permissions, side effects, or error conditions. The phrase 'via the pinned instance' is unclear.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence is concise and front-loaded with the core action. No wasted words, but could benefit from additional brief context.

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?

Basic description works for a simple tool but doesn't mention result or success condition. Output schema absent, so more detail expected.

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 covers both parameters fully (100% coverage). Description adds only minimal context beyond schema, consistent with baseline.

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?

Clearly states 'Update group settings' with specific examples: announcement mode and locked. Distinct from sibling tools that update other aspects like description or subject.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Implies usage for these two settings but lacks explicit when-to-use or when-not-to-use guidance. No mention of prerequisites like admin permissions.

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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