User Intuition

Send Participant Reward

send_participant_reward

DestructiveIdempotent

Send the configured incentive to a BYOP participant only after the human explicitly approves rewarding this participant. Reuse idempotency_key on uncertain retries; the backend prevents duplicate rewards for an already-paid participant.

Input Schema

TableJSON Schema

Name	Required	Description
`participant_id`	Yes
`idempotency_key`	No	Reuse the same key and inputs if a prior call timed out. A different operation needs a new key.
`organization_id`	No	Platform admins only: select an organization for this operation. Required when changing another organization’s study or using its wallet.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes	Reward delivery acknowledgement.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 1, 2026

addedInput schema / properties / organization_id

Added value: +{
+  "description": "Platform admins only: select an organization for this operation. Required when changing another organization’s study or using its wallet.",
+  "maxLength": 128,
+  "minLength": 1,
+  "type": "string"
+}

Changed5 schema fields changedSep 30, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

removedInput schema / additionalProperties
```
Removed value: -false
```

addedInput schema / properties / participant_id / pattern

Added value: +"^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"

changedOutput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

addedOutput schema / properties / result / propertyNames
```
Added value: +{
+  "type": "string"
+}
```

First observedSep 30, 2026

TDQS

A4.4/5.0

Behavior4/5

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

Annotations already declare destructiveHint, idempotentHint and openWorldHint, but the description adds real value beyond them: it explains the human-approval requirement and that the backend deduplicates rewards for already-paid participants. It stops short of stating what exactly is destroyed or what the response contains.

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 sentences, zero filler, and the safety-critical approval precondition is front-loaded before the retry mechanics.

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?

An output schema exists so return values need not be described, and the approval gate plus idempotency behavior cover the risky parts of this destructive write. The admin-only organization_id semantics are left entirely to the schema, which is a minor residual gap.

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 67%; idempotency_key and organization_id are already documented in the schema. The description reinforces the idempotency_key reuse semantics but says nothing about participant_id or the org-scoping parameter, so it adds only marginal meaning over the schema. Baseline 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?

States a specific verb (Send) and resource (configured incentive) scoped to a BYOP participant, and pairs it with a hard precondition. An agent can distinguish this from sibling write tools like update_participant or create_participants without opening a schema.

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?

Gives an explicit gate ('only after the human explicitly approves rewarding this participant') plus retry guidance ('reuse idempotency_key on uncertain retries'). The condition that selects this tool is stated rather than inferred.

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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