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Validate XML string against XSD

validate_xml_against_schema
Read-onlyIdempotent

Validate a raw pain.001 or pain.008 XML string against its official XSD. Returns whether the XML is valid and any error message.

Instructions

Validate a raw pain.001 / pain.008 XML string against its official XSD.

Use this to check XML you already have as a string (e.g. received from
another system) without touching the filesystem. To validate records
*before* they become XML, use ``validate_records``; to parse a statement
or status-report file, use ``parse_camt053`` / ``parse_pain002``.

Wraps :func:`pain001.xml.validate_via_xsd.validate_xml_string_via_xsd`.

Args:
    xml_content: The XML document as a string.
    message_type: A supported ISO 20022 pain message type.

Returns:
    ``{"valid": bool, "message_type": str, "error": str?}`` -
    ``error`` is present only when ``valid`` is ``False``.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
xml_contentYesThe full pain.001 / pain.008 XML document as a string, validated against the message type's official XSD.
message_typeYesA supported ISO 20022 pain message type. Must be exactly one of: 'pain.001.001.03', 'pain.001.001.04', 'pain.001.001.05', 'pain.001.001.06', 'pain.001.001.07', 'pain.001.001.08', 'pain.001.001.09', 'pain.001.001.10', 'pain.001.001.11', 'pain.001.001.12', 'pain.001.001.13', 'pain.008.001.02', 'pain.001', 'pain.008' (see list_message_types). The bare family names 'pain.001' and 'pain.008' are accepted as aliases for 'pain.001.001.09' and 'pain.008.001.02'.
Behavior4/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the description adds value by confirming no filesystem access and specifying the return structure with valid, message_type, and error fields.

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?

Well-structured with clear first line, usage guidance, function reference, and comprehensive Args/Returns. The line 'Wraps :func:pain001.xml.validate_via_xsd.validate_xml_string_via_xsd.' is slightly technical but adds traceability.

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?

For a 2-parameter validation tool with no output schema, the description fully covers inputs, return structure, and distinguishes from related tools. No gaps remain.

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 coverage is 100% and schema descriptions are detailed. The description adds an Args section but doesn't significantly extend beyond the schema, maintaining baseline score of 3.

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 clearly states 'Validate a raw pain.001 / pain.008 XML string against its official XSD', specifying verb (validate), resource (XML string against XSD), and scope (pain.001/pain.008). It differentiates from siblings like validate_records and parse_camt053.

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?

Explicitly states when to use (check XML as string without filesystem) and when not (use validate_records for pre-XML validation, use parse_camt053/pain002 for parsing). Also mentions alternative tools.

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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