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googleSandy

Google Threat Intelligence MCP Server

by googleSandy

get_entities_related_to_a_collection

Specify a collection ID and relationship type to retrieve related threat intelligence entities.

Instructions

Retrieve entities related to the the given collection ID.

The following table shows a summary of available relationships for collection objects.

Relationship

Description

Return type

associations

List of associated threats

collection

attack_techniques

List of attack techniques

attack_technique

domains

List of Domains

domain

files

List of Files

file

ip_addresses

List of IP addresses

ip_address

urls

List of URLs

url

threat_actors

List of related threat actors

collection

malware_families

List of related malware families

collection

software_toolkits

List of related tools

collection

campaigns

List of related campaigns

collection

vulnerabilities

List of related vulnerabilities

collection

reports

List of reports

collection

suspected_threat_actors

List of related suspected threat actors

collection

hunting_rulesets

Google Threat Intelligence Yara rules that identify the given collection

hunting_ruleset

Note on descriptors_only: When True, returns basic descriptors. When False, returns detailed attributes. IMPORTANT: descriptors_only must be False for the 'attack_techniques' relationship.

Args: id (required): Collection identifier. relationship_name (required): Relationship name. limit (optional): Limit the number of collections to retrieve. 10 by default. descriptors_only (optional)): Bool. Default True. Must be False when the target object type is 'attack_techniques'. Returns: List of objects related to the collection.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYes
relationship_nameYes
limitNo
descriptors_onlyNo
api_keyNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations provided, so the description must fully disclose behavior. It describes the return structure based on relationship, and the impact of `descriptors_only`. However, it does not explicitly state that the operation is read-only, idempotent, or mention any authentication or rate limit requirements. The behavioral coverage is adequate but not exhaustive.

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 well-structured with a table and bullet points. The first sentence is concise. Minor issues: double parenthesis in 'descriptors_only (optional)):' and 'the the' typo. The length is justified by the need to enumerate many relationships.

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 the complexity of multiple relationship types and an existing output schema, the description covers the essential information: valid relationships, return types, key parameter constraints, and default behavior. The missing explanation for `api_key` and lack of output schema details are minor gaps.

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 0%, so the description must compensate. It explains `id` implicitly as 'collection identifier', `relationship_name` via the table of valid values, `limit` with default, and `descriptors_only` with important note. However, the `api_key` parameter is not mentioned at all. Overall, the description adds meaningful semantics for most parameters.

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 'Retrieve entities related to the given collection ID.' and provides a detailed table of relationships with return types. The tool name and description differentiate it from siblings that retrieve entities related to other object types (domain, file, etc.).

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?

The description gives specific guidance on parameter usage, notably that `descriptors_only` must be `False` for `attack_techniques`. It explains default `limit` and the effect of `descriptors_only`. However, it does not explicitly state when to use this tool versus other entity retrieval tools, though the name and list of siblings provide implicit 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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