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by io.github.mcp-dir

openfinance_get_account_balance

Read-onlyIdempotent

Returns the latest available balance per account id (GET /accounts/:id/balance). This is the freshest balance the provider can serve, but it is a SNAPSHOT anchored to the connection's last upstream sync: the updateDateTime/updatedAt in each row is that sync instant, NOT a to-the-second live read. If a movement that just happened is not reflected yet, or the balance disagrees with the sum of openfinance_list_transactions, run openfinance_force_sync to pull fresh data and then re-read. Pass account_ids as an array (1–50). CREDIT accounts may return Pluggy BALANCE_FETCH_ERROR (provider could not fetch it) or BALANCE_CONSENT_ERROR (the institution refused it because the consent lacks the balance permission — reconnecting the bank restores it) — those rows include a structured warning instead of throwing. When the financial institution is temporarily unavailable upstream (5xx) or the connector is not Open Finance, the row DEGRADES to the last-synced balance with realtime: false, updatedAt and a warning instead of an error. Response shape: { results: [...], errors: [{ id, status, message }] }.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
account_idsYes

Schema Changelog

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TDQS

A4.8/5.0
Behavior5/5

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

The description goes well beyond the readOnly/idempotent annotations: it explains that updateDateTime/updatedAt is the sync instant, not a live read; describes BALANCE_FETCH_ERROR and BALANCE_CONSENT_ERROR; and details row degradation to realtime:false with warnings. These are non-obvious behaviors the agent needs to interpret results correctly.

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?

The description is long, but the length is justified by the complex error, degradation, and freshness semantics. It is front-loaded with the core purpose and endpoint, and each subsequent sentence adds meaningful operational detail rather than filler.

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?

Given that there is no output schema, the description covers the response shape, the errors array structure, per-row warning behavior, and the realtime flag. It also references sibling tools for the recovery path. Nothing essential for invoking or interpreting the tool is missing.

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?

With 0% schema coverage, the description compensates by telling the agent to pass account_ids as an array and constraining it to 1–50 items. It does not specify the exact format of each account id string, but for a single required parameter this is nearly sufficient.

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?

The description states a specific verb and resource: 'Returns the latest available balance per account id' with the exact endpoint. It clearly differentiates this from list-type tools and ties the snapshot semantics to the sync anchor rather than a live read.

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

Usage Guidelines5/5

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

It explicitly tells the agent when to use the alternative: if the balance is stale or disagrees with openfinance_list_transactions, run openfinance_force_sync and re-read. It also covers credit-account error cases and when degradation occurs, giving clear decision context beyond a simple tool description.

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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TDQS

A4/5.0
Disambiguation3/5

The openfinance_* family is largely well-differentiated by resource and action, but the monolithic `marketplace` tool bundles search, invoke, install, billing, and prompt-library actions into one name, creating ambiguity about where platform capabilities live. Additionally, `openfinance_list_transactions` and `openfinance_list_transactions_by_item` both return transaction data and could be misselected despite their different aggregation intent.

Naming Consistency3/5

The openfinance_* tools consistently follow a clear verb_noun pattern, which gives the majority of the surface a predictable shape. But the generic platform tools mix bare verbs (`authenticate`, `connect`), nouns (`marketplace`, `toolkit_info`), and verb_noun names (`report_bug`, `show_version`), so the server has two naming dialects rather than one uniform convention.

Tool Count3/5

At 25 tools, this sits right at the top of the heavy range, and the server genuinely spans two broad domains: MCP platform administration and Open Finance banking data. The count is defensible given the breadth, but it is not a lean or easily navigable surface for an agent.

Completeness4/5

The Open Finance side is quite complete, covering connections, accounts, transactions, credit card bills, loans, investments, categories, provider status, sync, and disconnection. The platform side covers authentication, connection status, marketplace operations, bug reporting, and versioning, though some marketplace sub-actions are packed into one tool and bank connection itself is only reachable through URLs returned by other tools.

Resources