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polyxmedia

@txn-dev/mcp-server

by polyxmedia

get_balance

Check the current balance of a specific agent wallet using its wallet ID. Verify available funds before making payments or transfers.

Instructions

Check the current balance of a specific agent wallet

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
wallet_idYesThe wallet ID to check

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.2

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full behavioral burden. It conveys only that the value is 'current' (as opposed to historical), and says nothing about read-only safety, authentication requirements, or behavior for an unknown/invalid wallet ID.

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?

One short sentence with the resource and scope front-loaded and zero filler. It is efficient, though minimal to the point of leaving gaps that conciseness alone cannot justify.

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?

For a one-parameter read tool with full schema coverage this is roughly adequate, but with no annotations and no output schema the description could usefully say what comes back (amount, currency, timestamp) and whether failures are possible.

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 description coverage is 100% for the single wallet_id parameter, so the baseline is 3. The description adds no syntax, format, or source detail beyond what the schema already documents.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a specific verb ('Check') and resource ('balance') scoped to 'a specific agent wallet', so an agent can distinguish it from list_wallets or fund_wallet at a glance. It stops short of naming any sibling or explicitly contrasting the per-wallet scope with the list variant.

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?

There is no statement of when to call this versus alternatives such as list_wallets or fund_wallet, and no prerequisites or exclusions are given. Usage is only implied by the tool name.

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