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Describe ASN.1 Node

describe_node

Describes an ASN.1 node by its node id, showing type, value, and children within a parsed ASN.1 structure.

Instructions

Describe a parsed ASN.1 node by node id.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataYesASN.1 input as PEM, HEX, base64, DER base64, or text.
nodeIdYesNode id from parse_asn1 output.
formatNoInput format. Use auto to detect PEM, HEX, base64, DER, or BER.auto
includeRawValueNoInclude raw primitive value hex.
includeHexPreviewNoInclude compact hex preview for primitive values.
hexPreviewLengthNoMaximum hex preview length.
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It only says 'Describe', which implies a read operation, but does not disclose whether it modifies anything, required permissions, or other behavioral traits. The agent has no insight into side effects.

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 a single sentence, front-loaded and to the point. It contains no unnecessary words, but could benefit from slightly more detail.

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?

The description is very sparse given the tool's complexity (6 parameters, multiple options). It does not explain what 'describe' means, the format of the output, or any usage caveats. Without an output schema, this is insufficient for effective use.

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%, so each parameter already has a description. The tool description adds no extra meaning or context beyond what the schema provides. Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose3/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states the verb 'Describe' and the resource 'parsed ASN.1 node by node id', which is clear but vague. It does not distinguish from sibling tools like 'extract_asn1_node' or 'asn1_node_value', which also retrieve node information.

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?

There is no guidance on when to use this tool versus alternatives, nor any exclusions or prerequisites. The description simply states the action without context.

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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