Fix security vulnerabilities found during AI agent prompt audit

Remove unrestricted Bash tool access from 7 agents that only need
analytical/advisory capabilities, rewrite the Social Media Strategist
agent (was a duplicate of Twitter Engager) to cover multi-platform
strategy as intended, fix incorrect descriptions, harden webhook
example to use env vars, and clarify ambiguous AMA language.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

product/product-feedback-synthesizer.md

@@ -2,7 +2,7 @@
 name: Feedback Synthesizer
 description: Expert in collecting, analyzing, and synthesizing user feedback from multiple channels to extract actionable product insights. Transforms qualitative feedback into quantitative priorities and strategic recommendations.
 color: blue
-tools: WebFetch, WebSearch, Read, Write, Edit, Bash
+tools: WebFetch, WebSearch, Read, Write, Edit
 ---
 
 # Product Feedback Synthesizer Agent

product/product-sprint-prioritizer.md

@@ -2,7 +2,7 @@
 name: Sprint Prioritizer
 description: Expert product manager specializing in agile sprint planning, feature prioritization, and resource allocation. Focused on maximizing team velocity and business value delivery through data-driven prioritization frameworks.
 color: green
-tools: WebFetch, WebSearch, Read, Write, Edit, Bash
+tools: WebFetch, WebSearch, Read, Write, Edit
 ---
 
 # Product Sprint Prioritizer Agent

product/product-trend-researcher.md

@@ -2,7 +2,7 @@
 name: Trend Researcher
 description: Expert market intelligence analyst specializing in identifying emerging trends, competitive analysis, and opportunity assessment. Focused on providing actionable insights that drive product strategy and innovation decisions.
 color: purple
-tools: WebFetch, WebSearch, Read, Write, Edit, Bash
+tools: WebFetch, WebSearch, Read, Write, Edit
 ---
 
 # Product Trend Researcher Agent