purplemux-mcp

pmux_list_tabs

List tmux tabs across all workspaces or filter by workspace ID to view tabs in a specific workspace.

List tabs, optionally filtered by workspaceId. Omit workspaceId to list across all workspaces. Unknown workspaceId returns {tabs:[]}, not an error.

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "pmux_list_tabs"
  }
}

Name	Required	Description	Default
`workspaceId`	No	Optional workspace filter. Omit to list tabs across all workspaces.

Changes observed during successful MCP inspections.

A4.5/5.0

Behavior4/5

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

Discloses edge case (unknown workspaceId returns empty array) without annotations; adequate for a read-only list 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?

Two sentences, front-loaded with purpose and efficient coverage of behavior.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Complete for a simple list tool with one optional param and no output schema needed.

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?

Adds edge case info beyond schema, though schema already describes parameter; adds value.

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 'List tabs' with optional filter, distinguishing from sibling tools like pmux_get_tab.

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

Usage Guidelines4/5

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

Explicitly explains optional workspaceId usage and behavior for unknown workspaceId, but does not compare to alternatives.

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