Capture what you read in the browser by saving exact visible excerpts, honest scope/coverage, and retaining missing items—never cookies, passwords, or guessed dates.
Save evidence actually read in the browser. Include exact visible excerpts and honest scope/coverage. No cookies, passwords, auth links or guessed dates. Items missing from this page are retained.
| Name | Required | Description | Default |
|---|---|---|---|
| observation | Yes |
Changes observed during successful MCP inspections.
v0.5.0Input schema / $defsRemoved value: -{
- "Item": {
- "additionalProperties": false,
- "properties": {
- "course_id": {
- "anyOf": [
- {
- "maxLength": 300,
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Course Id"
- },
- "course_title": {
- "anyOf": [
- {
- "maxLength": 500,
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Course Title"
- },
- "due_at": {
- "anyOf": [
- {
- "format": "date-time",
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Due At"
- },
- "due_date": {
- "anyOf": [
- {
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Due Date"
- },
- "ends_at": {
- "anyOf": [
- {
- "format": "date-time",
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Ends At"
- },
- "excerpt": {
- "maxLength": 3000,
- "minLength": 1,
- "title": "Excerpt",
- "type": "string"
- },
- "kind": {
- "enum": [
- "course",
- "resource",
- "assignment",
- "event",
- "announcement",
- "service"
- ],
- "title": "Kind",
- "type": "string"
- },
- "native_id": {
- "maxLength": 300,
- "minLength": 1,
- "title": "Native Id",
- "type": "string"
- },
- "service_id": {
- "anyOf": [
- {
- "maxLength": 100,
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Service Id"
- },
- "starts_at": {
- "anyOf": [
- {
- "format": "date-time",
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Starts At"
- },
- "status": {
- "default": "unknown",
- "enum": [
- "unknown",
- "available",
- "unavailable",
- "submitted",
- "graded",
- "cancelled"
- ],
- "title": "Status",
- "type": "string"
- },
- "title": {
- "maxLength": 500,
- "minLength": 1,
- "title": "Title",
- "type": "string"
- },
- "url": {
- "anyOf": [
- {
- "type": "string"
- },
- {
- "type": "null"
- }
- ],
- "default": null,
- "title": "Url"
- }
- },
- "required": [
- "native_id",
- "kind",
- "title",
- "excerpt"
- ],
- "title": "Item",
- "type": "object"
- },
- "Observation": {
- "additionalProperties": false,
- "properties": {
- "authentication": {
- "default": "unknown",
- "enum": [
- "authenticated",
- "login_required",
- "unknown"
- ],
- "title": "Authentication",
- "type": "string"
- },
- "coverage": {
- "default": "partial",
- "enum": [
- "partial",
- "complete_visible_scope"
- ],
- "title": "Coverage",
- "type": "string"
- },
- "items": {
- "items": {
- "$ref": "#/$defs/Item"
- },
- "maxItems": 500,
- "title": "Items",
- "type": "array"
- },
- "observed_at": {
- "format": "date-time",
- "title": "Observed At",
- "type": "string"
- },
- "scope": {
- "maxLength": 500,
- "minLength": 1,
- "title": "Scope",
- "type": "string"
- },
- "source": {
- "enum": [
- "learn",
- "myed",
- "timetable",
- "library",
- "university"
- ],
- "title": "Source",
- "type": "string"
- },
- "source_url": {
- "title": "Source Url",
- "type": "string"
- },
- "text": {
- "maxLength": 100000,
- "minLength": 1,
- "title": "Text",
- "type": "string"
- },
- "title": {
- "maxLength": 500,
- "minLength": 1,
- "title": "Title",
- "type": "string"
- }
- },
- "required": [
- "source",
- "source_url",
- "title",
- "observed_at",
- "scope",
- "text"
- ],
- "title": "Observation",
- "type": "object"
- }
-}Input schema / properties / observation / $refRemoved value: -"#/$defs/Observation"Input schema / properties / observation / additionalPropertiesAdded value: +falseInput schema / properties / observation / propertiesAdded value: +{
+ "authentication": {
+ "default": "unknown",
+ "enum": [
+ "authenticated",
+ "login_required",
+ "unknown"
+ ],
+ "type": "string"
+ },
+ "coverage": {
+ "default": "partial",
+ "enum": [
+ "partial",
+ "complete_visible_scope"
+ ],
+ "type": "string"
+ },
+ "items": {
+ "description": "Server validates: maxItems=500.",
+ "items": {
+ "additionalProperties": false,
+ "properties": {
+ "course_id": {
+ "default": null,
+ "oneOf": [
+ {
+ "description": "Server validates: maxLength=300.",
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "course_title": {
+ "default": null,
+ "oneOf": [
+ {
+ "description": "Server validates: maxLength=500.",
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "due_at": {
+ "default": null,
+ "oneOf": [
+ {
+ "description": "Server validates: format=date-time.",
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "due_date": {
+ "default": null,
+ "oneOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "ends_at": {
+ "default": null,
+ "oneOf": [
+ {
+ "description": "Server validates: format=date-time.",
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "excerpt": {
+ "description": "Server validates: maxLength=3000, minLength=1.",
+ "type": "string"
+ },
+ "kind": {
+ "enum": [
+ "course",
+ "resource",
+ "assignment",
+ "event",
+ "announcement",
+ "service"
+ ],
+ "type": "string"
+ },
+ "native_id": {
+ "description": "Server validates: maxLength=300, minLength=1.",
+ "type": "string"
+ },
+ "service_id": {
+ "default": null,
+ "oneOf": [
+ {
+ "description": "Server validates: maxLength=100.",
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "starts_at": {
+ "default": null,
+ "oneOf": [
+ {
+ "description": "Server validates: format=date-time.",
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "status": {
+ "default": "unknown",
+ "enum": [
+ "unknown",
+ "available",
+ "unavailable",
+ "submitted",
+ "graded",
+ "cancelled"
+ ],
+ "type": "string"
+ },
+ "title": {
+ "description": "Server validates: maxLength=500, minLength=1.",
+ "type": "string"
+ },
+ "url": {
+ "default": null,
+ "oneOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ }
+ },
+ "required": [
+ "native_id",
+ "kind",
+ "title",
+ "excerpt"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "observed_at": {
+ "description": "Server validates: format=date-time.",
+ "type": "string"
+ },
+ "scope": {
+ "description": "Server validates: maxLength=500, minLength=1.",
+ "type": "string"
+ },
+ "source": {
+ "enum": [
+ "learn",
+ "myed",
+ "timetable",
+ "library",
+ "university"
+ ],
+ "type": "string"
+ },
+ "source_url": {
+ "type": "string"
+ },
+ "text": {
+ "description": "Server validates: maxLength=100000, minLength=1.",
+ "type": "string"
+ },
+ "title": {
+ "description": "Server validates: maxLength=500, minLength=1.",
+ "type": "string"
+ }
+}Input schema / properties / observation / requiredAdded value: +[
+ "source",
+ "source_url",
+ "title",
+ "observed_at",
+ "scope",
+ "text"
+]Input schema / properties / observation / typeAdded value: +"object"Input schema / titleRemoved value: -"study_captureArguments"v0.4.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=false (a write) and destructiveHint=false, consistent with 'Save'. The description adds genuine context beyond the annotations: privacy exclusions (no cookies/passwords/auth links) and the retention rule that 'items missing from this page are retained'. This is real behavioral disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Three short, front-loaded sentences with the purpose first and constraints following. Efficient, though slightly terse and stream-of-consciousness in the constraint list.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a complex nested write schema with no output schema, the description conveys intent, privacy rules, and retention semantics but gives no field-level guidance for the many nested properties or their enums. Adequate at the intent level, thin at the structural level.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0% and the single parameter is a deeply nested object with many undocumented fields (source enum, items array, kind/status enums). The description hints at excerpts, scope/coverage, and no guessed dates, partially compensating, but leaves most fields without semantic guidance.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ('Save evidence actually read in the browser'), which is clear on its own. However, it does not differentiate from overlapping siblings like study_collect or study_evidence, so an agent must still infer which of these capture-type tools applies.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Implies usage (when you have read something in the browser) and gives negative constraints ('No cookies, passwords, auth links or guessed dates'), which is useful. But it never states when to prefer this over alternatives such as study_collect or study_evidence, nor any prerequisites.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.