[PLAY] Your VIA Points balance, the cross-brand network loyalty balance. Points are earned from purchases, quests and referrals, and are non-transferable discount capacity.
| Name | Required | Description | Default |
|---|---|---|---|
| agent_wallet | Yes | Agent wallet address on Base |
Changes observed during successful MCP inspections.
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits itself. It explains what points are (earned from purchases, quests, referrals, non-transferable) but does not state the tool's behavior, such as whether it performs a read-only lookup, the return format, or potential error conditions.
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?
The description is short and front-loaded with the core concept. The second sentence about how points are earned is somewhat extraneous but does not significantly bloat the description.
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?
The description is incomplete for a getter tool: it does not explicitly state that the tool returns the balance for the provided wallet, nor does it mention any response format or error handling. Without an output schema or annotations, more detail is needed.
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?
The schema provides 100% coverage for the single parameter agent_wallet with a clear description ('Agent wallet address on Base'). The tool description adds no parameter-specific meaning, so the baseline score of 3 applies.
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?
The description clearly indicates that this tool pertains to a VIA Points balance, distinguishing it from other get_* tools like get_agent_pass or get_offers. However, it lacks an explicit verb such as 'returns' or 'retrieves', relying on the tool name to convey the action.
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?
No guidance is provided about when to use this tool versus alternatives like check_agent_standing or redeem_points. There is no mention of prerequisites, context, or exclusions.
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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