User Intuition

Delete Participant

delete_participant

DestructiveIdempotent

Soft-delete one BYOP invitation after the user explicitly requests it. Deletion also removes its personal link. If interviews exist, the request returns a conflict unless the user separately approves deleting those interviews and cascade_interviews is true.

Input Schema

Name	Required	Description
`participant_id`	Yes
`organization_id`	No	Organization for this operation and billing. Use list_organizations to choose an active membership.
`cascade_interviews`	No

Output Schema

Name	Required	Description	Default
`result`	Yes	Participant deletion acknowledgement.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 22, 2026

changedInput schema / properties / organization_id / description

Previous value: -"Platform admins only: select an organization for this operation. Required when changing another organization’s study or using its wallet."New value: +"Organization for this operation and billing. Use list_organizations to choose an active membership."

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"

changedOutput schema / properties / result / additionalProperties
```
Previous value: -trueNew value: +{}
```

First observedSep 30, 2026

TDQS

A4.9/5.0

Behavior5/5

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

Beyond annotations, which already flag destructive and idempotent behavior, the description adds that this is a soft-delete, removes the personal link, and may return a conflict unless cascade deletion is explicitly approved. Those are meaningful behavioral details for a destructive operation.

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 compact sentences, front-loaded with the core action and followed immediately by the most important behavioral caveat. No sentence is wasted.

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?

The description covers the destructive action, the soft-delete semantics, the link-removal effect, and the cascade prerequisite. With an output schema present and annotations covering safety, no additional description is needed for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is only 33%, so the description carries meaningful burden. It clearly explains cascade_interviews' gating behavior and the conflict condition, while participant_id is implied by the singular BYOP invitation scope. organization_id is not described here, but the schema already supplies its guidance.

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 uses a specific verb and resource ('Soft-delete one BYOP invitation') and clarifies the scope narrowly, distinguishing it from broader deletion tools. It also explains what is removed, namely the participant's personal link.

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 says deletion should occur only after the user explicitly requests it, and explains the conflict condition when interviews exist. It also states that the user must separately approve deleting interviews and that cascade_interviews must be true.

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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