Check your current billing tier, monthly API usage, remaining quota, and overage costs to understand your plan and usage limits.
Check your current ZuckerBot billing tier, API call usage this month, remaining quota, and overage costs. Use this when a user asks about their plan or usage limits.
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Changes observed during successful MCP inspections.
v0.4.4Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Discloses that it reads billing information but does not explicitly state it's read-only. Acceptable for a simple lookup tool with no side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two short, front-loaded sentences with no redundancy. Every word adds value.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no parameters and no output schema, the description sufficiently covers what the tool returns (tier, usage, quota, overage). No gaps.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
No parameters exist, and schema coverage is 100%. Description adds no param info because none needed. Baseline 3.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Clear verb 'Check' and specific resource 'billing status' with explicit outputs: tier, usage, quota, overage. No sibling tool covers billing, so it's distinct.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly states 'Use this when a user asks about their plan or usage limits.' Provides clear context for invocation.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.