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PatricioRios

mmex-mcp

by PatricioRios

mmex_transactions_update_split

Update an existing split transaction by specifying split ID, transaction ID, amount, category, and notes to keep financial records accurate.

Instructions

Update an existing split.

    Args:
        split_id: Split ID.
        transaction_id: Transaction ID.
        amount: Split amount.
        category_id: Category ID.
        notes: Notes.
        db_path: Path to the .mmb database file. Optional if MMEX_DB_PATH env var is set.
        db_key: Encryption key for SQLCipher databases. Optional if MMEX_DB_KEY env var is set.
    

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
split_idYes
transaction_idYes
amountYes
category_idNo
notesNo
db_pathNo
db_keyNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, and the description does not disclose behavioral traits beyond stating the update action. It omits details about side effects, permissions required, error handling, or whether the operation is idempotent.

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 concise with one sentence plus parameter list. It avoids verbosity, though the parameter list is somewhat lengthy. The structure is straightforward and easy to parse.

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

Completeness2/5

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

Given the tool has 7 parameters and is a mutation with no annotations, the description lacks completeness. It does not explain return values (despite an output schema), error conditions, or behavior for missing resources. The environment variable hints for db_path and db_key are helpful but insufficient.

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?

With 0% schema description coverage, the description's parameter list adds minimal meaning beyond the schema names. The notes for db_path and db_key provide useful context about environment variables, but other parameters (amount, category_id, notes) are described tautologically.

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 'Update an existing split', which is a clear verb+resource pair. This distinguishes it from sibling tools like mmex_transactions_add_split (add) and mmex_transactions_delete_split (delete).

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?

The description provides no guidance on when to use this tool versus alternatives, such as mmex_transactions_update or update_partial. It does not mention prerequisites, constraints, or when not to use the tool.

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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