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Get HPO Term Children

get_term_children
Read-onlyIdempotent

Retrieve the immediate more-specific phenotype terms (direct is_a children) for a given HPO term.

Instructions

Return the direct is_a children (immediate more-specific phenotype terms) of an HPO term. Use get_term_descendants for the full transitive set. Signature: get_term_children(hpo_id, response_mode=).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
hpo_idYesCanonical HP id for the resolved HPO term (HP:0000118). Legacy `term` arguments are accepted as an alias.
response_modeNoVerbosity: minimal|compact|standard|full (default compact).compact

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
hintNo
nameNo
_metaNo
countNo
fieldNo
hpo_idNo
messageNo
successNo
childrenNo
retryableNo
candidatesNo
error_codeNo
hpo_versionNo
allowed_valuesNo
recovery_actionNo
Behavior3/5

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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint. Description adds no behavioral details beyond purpose. It is consistent but does not enhance transparency beyond annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two short, front-loaded sentences: one for purpose, one for usage guidance and signature. No redundant or unnecessary information.

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 annotations covering safety, full schema coverage, and presence of output schema, the description sufficiently conveys purpose and key alternative. No gaps for a read-only, idempotent query tool.

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 covers both parameters with descriptions and examples (100% coverage). Description adds only the function signature, which adds minimal value beyond schema. Baseline of 3 is appropriate.

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?

Description clearly states verb 'return' and specific resource 'direct is_a children of an HPO term'. It distinguishes itself from sibling tool 'get_term_descendants' by contrasting immediate vs full transitive set.

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

Usage Guidelines4/5

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

Explicitly mentions alternative for full transitive set ('get_term_descendants'), providing clear guidance on when not to use this tool. Could benefit from mentioning other siblings like 'get_term_parents' but the key distinction is covered.

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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