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Itaú MCP

by io.github.mcp-dir

openfinance_list_investments

Read-onlyIdempotent

Returns the investment portfolio for a connection (broker or bank with INVESTMENTS product enabled): FIIs, stocks, ETFs, fixed income (CDB/LCI/LCA/Tesouro), mutual funds, retirement (previdência) and COE. Each row carries balance, amount, amountOriginal, amountProfit, lastMonthRate / annualRate / lastTwelveMonthsRate (when available), dueDate, issuer, ISIN, etc. Returns { total:0, results:[], warning } instead of throwing when INVESTMENTS isn't enabled (403) or other upstream errors. DATA INTEGRITY: when MULTIPLE positions come back as TOTAL_WITHDRAWAL with balance/quantity 0 at once (mass zeroing), the tool cross-checks each position's own transaction history upstream; if the zeroing is contradicted (BUY with no sale/redemption/transfer) the response carries data_integrity_warning and the affected rows are flagged integrity:'suspect_zeroed' — treat those balances as UNAVAILABLE (likely a temporary connector failure publishing zeros), never as real R$0, and do NOT sum them into the portfolio.

Bulk support: accepts item_ids for batched execution.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
itemNo
pageNo
typeNo
item_idNo
item_idsNo
page_sizeNo

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Added
  2. Removed
  3. Added
  4. Removed
  5. Changed2 schema fields changed
    • addedInput schema / properties / item_id
      Added value: +{
+  "type": "string"
+}
    • addedInput schema / properties / item_ids
      Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
  6. Added
  7. Removed
  8. First observed

TDQS

A4/5.0
Behavior5/5

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

Beyond annotations (readOnlyHint, idempotentHint, non-destructive), the description adds critical behavior: error handling (returns warning instead of throwing), data integrity checks with 'data_integrity_warning' and 'suspect_zeroed' flags, and explicit instruction to not treat suspect zeroed balances as real. This far exceeds annotation context.

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 front-loaded with main purpose, then error handling, then data integrity caveats. It is detailed but efficient, with no redundant sentences. However, it could be slightly more concise by omitting some internal details like specific rate fields.

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

Completeness4/5

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

Given no output schema, the description covers return structure (fields like balance, amount, dueDate), error handling, and data integrity warnings. It provides enough context for an agent to use the tool effectively, though it could explain parameters more.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, yet the description does not explain any parameters (item, page, type, etc.). It mentions bulk support with item_ids but provides no details on how to use other parameters. The agent must infer meaning from names alone.

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 explicitly states the tool returns the investment portfolio for a connection, listing specific types (FIIs, stocks, ETFs, etc.) and includes data integrity features. It clearly distinguishes from sibling tools like openfinance_list_investment_transactions which handle transactions rather than holdings.

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

Usage Guidelines3/5

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

The description implies usage for retrieving portfolio holdings and mentions bulk support with item_ids, but it does not explicitly guide when to use this tool over alternatives (e.g., openfinance_list_investment_transactions). No exclusion criteria or context for sibling differentiation.

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 Open Finance tools have clear list/get pairs for each resource (accounts, transactions, loans, investments, bills), but the marketplace tool is a monolith combining search, describe, invoke, install, subscribe, and prompt library actions, causing ambiguity about which action to use. Additionally, openfinance_list_transactions and openfinance_list_transactions_by_item overlap in purpose but are distinguished by scope.

Naming Consistency3/5

The openfinance_* group follows a consistent verb_noun pattern (list, get, update, force_sync, etc.), but the platform tools (authenticate, connect, marketplace, show_version, report_bug, toolkit_info) use mixed bare verbs and nouns, creating two distinct conventions. Names like openfinance_list_transactions_by_item are longer but still consistent within the group.

Tool Count4/5

25 tools is at the heavy end, but the Open Finance domain alone justifies 17 tools covering distinct resources and operations. The platform tools add 8 more, though the marketplace tool bundles many sub-actions into one, inflating the effective count. The number is borderline but not excessive given the breadth of banking functionality.

Completeness5/5

The Open Finance surface is comprehensive with list/get for every major resource, plus support for sync, status, search, categories, and category updates. The platform tools cover authentication, connection status, marketplace operations, bug reporting, version, and toolkit state. No obvious gaps or dead ends in the workflow.

Resources