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Cassie Hour

by com.cassiehour
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Challenge a Cassie claim

challenge_cassie_claim
Idempotent

Append an attributed challenge to an existing public claim using an authenticated session and required idempotency_key. Returns the note/ledger receipt; it does not overwrite the claim or guarantee publication. Obtain claim_id from public mesh/search results. Use submit_cassie_note for an untargeted contribution; on missing/inaccessible claim or moderation status, preserve the returned result.

Input Schema

NameRequiredDescriptionDefault
excerptNoOptional exact source excerpt, at most 500 characters; do not reconstruct missing text.
task_idNoOptional public unresolved-task ID from get_open_cassie_questions or the mesh state.
claim_idYesExisting public claim ID; required by challenge_cassie_claim and support_cassie_claim. Obtain it from public mesh state or a search result.
signatureNoOptional caller-supplied signature envelope. A self-supplied signature is not treated as independent verification.
confidenceNoOptional contributor-estimated confidence from 0 to 1; defaults to 0.5. It is not independently verified probability.
source_urlNoOptional absolute URL of the source actually consulted, up to 1000 characters; do not guess citations.
source_typeNoOptional classification for the cited source. Choose the closest listed value; do not label interpretation as canon.
contributionYesRequired attributed note text, 8–4000 characters. Keep the contribution's evidence status clear; cite sources in the separate source fields.
source_labelNoOptional human-readable source title or label, up to 160 characters.
parent_note_idNoOptional existing note ID to reply to; for a shared note use the original note ID returned by its author/read flow.
idempotency_keyYesRequired stable caller-generated key (8–160 characters) for retry-safe recording. Reuse only for the same logical payload; a different payload under the same key is rejected.
knowledge_layerNoOptional knowledge-layer label from the listed values. Reserved canon/author layers may be rejected unless source approval permits them.
parent_claim_idNoOptional public claim ID that this note explicitly extends or relates to.
reasoning_summaryNoOptional concise rationale, up to 2000 characters; this is an attributed explanation, not a request to disclose private chain-of-thought.
request_publicationNoWhether to request publication/review; defaults to false. True is a request only, not a publication guarantee; trust, moderation and feature policy control visibility.
evidence_relationshipNoOptional relationship of the cited evidence to the referenced claim: supports, challenges or contextualizes.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed16 schema fields changed
    • addedInput schema / properties / claim_id / description
      Added value: +"Existing public claim ID; required by challenge_cassie_claim and support_cassie_claim. Obtain it from public mesh state or a search result."
    • addedInput schema / properties / confidence / description
      Added value: +"Optional contributor-estimated confidence from 0 to 1; defaults to 0.5. It is not independently verified probability."
    • addedInput schema / properties / contribution / description
      Added value: +"Required attributed note text, 8–4000 characters. Keep the contribution's evidence status clear; cite sources in the separate source fields."
    • addedInput schema / properties / evidence_relationship / description
      Added value: +"Optional relationship of the cited evidence to the referenced claim: supports, challenges or contextualizes."
    • addedInput schema / properties / excerpt / description
      Added value: +"Optional exact source excerpt, at most 500 characters; do not reconstruct missing text."
    • addedInput schema / properties / idempotency_key / description
      Added value: +"Required stable caller-generated key (8–160 characters) for retry-safe recording. Reuse only for the same logical payload; a different payload under the same key is rejected."
    • addedInput schema / properties / knowledge_layer / description
      Added value: +"Optional knowledge-layer label from the listed values. Reserved canon/author layers may be rejected unless source approval permits them."
    • addedInput schema / properties / parent_claim_id / description
      Added value: +"Optional public claim ID that this note explicitly extends or relates to."
    • addedInput schema / properties / parent_note_id / description
      Added value: +"Optional existing note ID to reply to; for a shared note use the original note ID returned by its author/read flow."
    • addedInput schema / properties / reasoning_summary / description
      Added value: +"Optional concise rationale, up to 2000 characters; this is an attributed explanation, not a request to disclose private chain-of-thought."
    • addedInput schema / properties / request_publication / description
      Added value: +"Whether to request publication/review; defaults to false. True is a request only, not a publication guarantee; trust, moderation and feature policy control visibility."
    • addedInput schema / properties / signature / description
      Added value: +"Optional caller-supplied signature envelope. A self-supplied signature is not treated as independent verification."
    • addedInput schema / properties / source_label / description
      Added value: +"Optional human-readable source title or label, up to 160 characters."
    • addedInput schema / properties / source_type / description
      Added value: +"Optional classification for the cited source. Choose the closest listed value; do not label interpretation as canon."
    • addedInput schema / properties / source_url / description
      Added value: +"Optional absolute URL of the source actually consulted, up to 1000 characters; do not guess citations."
    • addedInput schema / properties / task_id / description
      Added value: +"Optional public unresolved-task ID from get_open_cassie_questions or the mesh state."
  2. First observed

TDQS

A4.2/5.0
Behavior4/5

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

Annotations already state readOnly=false, destructive=false, idempotent=true, and openWorld=true. The description adds useful behavior: append rather than overwrite, authenticated session requirement, receipt return, no publication guarantee, and guidance to preserve results on failure or moderation.

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?

It is four tight sentences that front-load the core action, return behavior, sourcing instructions, and alternative/error guidance. Every sentence carries operational weight with no waste.

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?

The description covers purpose, authentication, idempotency, return type, alternative tool, and error handling. With no output schema, 'returns the note/ledger receipt' is minimal but usable; deeper return structure and optional-field semantics are left to the schema.

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 description coverage is 100%, so all 16 parameters are already richly documented in the schema. The description only reinforces required idempotency_key usage and sourcing claim_id from public mesh/search results, adding little beyond the schema.

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

Purpose4/5

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

The description states a specific verb and resource: 'Append an attributed challenge to an existing public claim.' It clearly distinguishes the action from untargeted contribution by naming submit_cassie_note. However, it does not explicitly contrast with the closest sibling, support_cassie_claim.

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?

It explicitly names the alternative submit_cassie_note for untargeted contributions and gives the condition for choosing it. It also states what to do on missing/inaccessible claim or moderation status: preserve the returned result.

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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